https://www.explainxkcd.com/wiki/index.php?title=2680:_Battery_Life&feed=atom&action=history2680: Battery Life - Revision history2024-03-29T09:44:28ZRevision history for this page on the wikiMediaWiki 1.30.0https://www.explainxkcd.com/wiki/index.php?title=2680:_Battery_Life&diff=296458&oldid=prevArséniureDeGallium: /* Explanation */ this is good enough2022-10-11T19:20:10Z<p><span dir="auto"><span class="autocomment">Explanation: </span> this is good enough</span></p>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>==Explanation==</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>==Explanation==</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">{{incomplete|Created by a BOT WITH ONE MONTH OF BATTERY LIFE LEFT. Do NOT delete this tag too soon.}}</del></div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;"></del></div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>Smartphones run on batteries that require frequent charging; they may also be frequently replaced with a newer model by their user, though battery life is only one of several reasons why they may do this. In this comic, instead of charging his phone every day for a few years and then buying a new phone, [[Cueball]] has obtained a phone with a battery big enough to last supposedly until the phone will be replaced after a few years. This appears to make for a phone of cumbersome weight and size. According to the caption, 10% of battery life corresponds to 1–2 months; this suggests a total battery life and hence product life of 10–20 months, which is less than two years. A 'few' is generally [https://www.merriam-webster.com/words-at-play/couple-few-several-use more than that], even in the [[1070: Words for Small Sets|world of xkcd]]. (This assumes that he'd be 'good' right up until 0%. He could be just talking about being generally unconcerned until it reaches 5%, say, from which point he knows he'll have a similar further amount of time to start seriously thinking about arranging the full replacement, and all that this entails.) More practically, [https://www.forbes.com/sites/christopherhelman/2013/09/07/how-much-energy-does-your-iphone-and-other-devices-use-and-what-to-do-about-it/?sh=6f8e6fed2f70 a smartphone requires around 2 kWh per year] (assuming this is not otherwise an [[:Category:xkcd Phones|untypical phone]] in terms of power requirements), so this 12 kWh battery could have been expected to last even longer.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>Smartphones run on batteries that require frequent charging; they may also be frequently replaced with a newer model by their user, though battery life is only one of several reasons why they may do this. In this comic, instead of charging his phone every day for a few years and then buying a new phone, [[Cueball]] has obtained a phone with a battery big enough to last supposedly until the phone will be replaced after a few years. This appears to make for a phone of cumbersome weight and size. According to the caption, 10% of battery life corresponds to 1–2 months; this suggests a total battery life and hence product life of 10–20 months, which is less than two years. A 'few' is generally [https://www.merriam-webster.com/words-at-play/couple-few-several-use more than that], even in the [[1070: Words for Small Sets|world of xkcd]]. (This assumes that he'd be 'good' right up until 0%. He could be just talking about being generally unconcerned until it reaches 5%, say, from which point he knows he'll have a similar further amount of time to start seriously thinking about arranging the full replacement, and all that this entails.) More practically, [https://www.forbes.com/sites/christopherhelman/2013/09/07/how-much-energy-does-your-iphone-and-other-devices-use-and-what-to-do-about-it/?sh=6f8e6fed2f70 a smartphone requires around 2 kWh per year] (assuming this is not otherwise an [[:Category:xkcd Phones|untypical phone]] in terms of power requirements), so this 12 kWh battery could have been expected to last even longer.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
</table>ArséniureDeGalliumhttps://www.explainxkcd.com/wiki/index.php?title=2680:_Battery_Life&diff=296409&oldid=prev172.71.178.207: /* Explanation */ Rejigged the pragraph split to recombine the 'time for this battery' (with possible circumstancial exception), and yet maintain 'general battery calculations' separately, for flow reasons.2022-10-11T08:36:40Z<p><span dir="auto"><span class="autocomment">Explanation: </span> Rejigged the pragraph split to recombine the 'time for this battery' (with possible circumstancial exception), and yet maintain 'general battery calculations' separately, for flow reasons.</span></p>
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<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 08:36, 11 October 2022</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>{{incomplete|Created by a BOT WITH ONE MONTH OF BATTERY LIFE LEFT. Do NOT delete this tag too soon.}}</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>{{incomplete|Created by a BOT WITH ONE MONTH OF BATTERY LIFE LEFT. Do NOT delete this tag too soon.}}</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Smartphones run on batteries that require frequent charging; they may also be frequently replaced with a newer model by their user, though battery life is only one of several reasons why they may do this. In this comic, instead of charging his phone every day for a few years and then buying a new phone, [[Cueball]] has obtained a phone with a battery big enough to last supposedly until the phone will be replaced after a few years. This appears to make for a phone of cumbersome weight and size. According to the caption, 10% of battery life corresponds to 1–2 months; this suggests a total battery life and hence product life of 10–20 months, which is less than two years. A 'few' is generally [https://www.merriam-webster.com/words-at-play/couple-few-several-use more than that], even in the [[1070: Words for Small Sets|world of xkcd]]. (This assumes that he'd be 'good' right up until 0%. He could be just talking about being generally unconcerned until it reaches 5%, say, from which point he knows he'll have a similar further amount of time to start seriously thinking about arranging the full replacement, and all that this entails.)</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Smartphones run on batteries that require frequent charging; they may also be frequently replaced with a newer model by their user, though battery life is only one of several reasons why they may do this. In this comic, instead of charging his phone every day for a few years and then buying a new phone, [[Cueball]] has obtained a phone with a battery big enough to last supposedly until the phone will be replaced after a few years. This appears to make for a phone of cumbersome weight and size. According to the caption, 10% of battery life corresponds to 1–2 months; this suggests a total battery life and hence product life of 10–20 months, which is less than two years. A 'few' is generally [https://www.merriam-webster.com/words-at-play/couple-few-several-use more than that], even in the [[1070: Words for Small Sets|world of xkcd]]. (This assumes that he'd be 'good' right up until 0%. He could be just talking about being generally unconcerned until it reaches 5%, say, from which point he knows he'll have a similar further amount of time to start seriously thinking about arranging the full replacement, and all that this entails.) <ins class="diffchange diffchange-inline">More practically, [https://www.forbes.com/sites/christopherhelman/2013/09/07/how-much-energy-does-your-iphone-and-other-devices-use-and-what-to-do-about-it/?sh=6f8e6fed2f70 a smartphone requires around 2 kWh per year] (assuming this is not otherwise an [[:Category:xkcd Phones|untypical phone]] in terms of power requirements), so this 12 kWh battery could have been expected to last even longer.</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del class="diffchange diffchange-inline">More practically, [https://www.forbes.com/sites/christopherhelman/2013/09/07/how-much-energy-does-your-iphone-and-other-devices-use-and-what-to-do-about-it/?sh=6f8e6fed2f70 a smartphone requires around 2 kWh per year], so this 12 kWh battery could have been expected to last longer. </del>A 12 kWh battery weighing 100 pounds (45 kg) has an energy density of 264.6 Wh/kg, about equal to the high-estimate of the energy density of {{w|Lithium-ion battery|lithium-ion batteries}} of 100–265 Wh/kg. However, it is well below the practically achievable energy densities of (non-rechargeable, as befits the application) {{w|Zinc-air battery|zinc-air batteries}} at around 400 Wh/kg. Unfortunately, {{w|Self-discharge}} means that if this battery is lithium polymer, it will lose on average 5% of its charge per month, which totals to 46% lost each year. If this were a non rechargeable battery such a lithium metal, its battery life could be much longer.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>A 12 kWh battery weighing 100 pounds (45 kg) has an energy density of 264.6 Wh/kg, about equal to the high-estimate of the energy density of {{w|Lithium-ion battery|lithium-ion batteries}} of 100–265 Wh/kg. However, it is well below the practically achievable energy densities of (non-rechargeable, as befits the application) {{w|Zinc-air battery|zinc-air batteries}} at around 400 Wh/kg. Unfortunately, {{w|Self-discharge}} means that if this battery is lithium polymer, it will lose on average 5% of its charge per month, which totals to 46% lost each year. If this were a non rechargeable battery such a lithium metal, its battery life could be much longer.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>This comic appeared on [https://techxplore.com/news/2022-10-eu-lawmakers-impose-charger-smartphones.html the same day that the European Union standardized charging adapters for mobile phones.]</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>This comic appeared on [https://techxplore.com/news/2022-10-eu-lawmakers-impose-charger-smartphones.html the same day that the European Union standardized charging adapters for mobile phones.]</div></td></tr>
</table>172.71.178.207https://www.explainxkcd.com/wiki/index.php?title=2680:_Battery_Life&diff=296408&oldid=prev141.101.99.32: /* Explanation */ Added xkcd 'authority' on "few", removed condecension, fulfilled 'citation needed' (the joke is fulfilled out of practicality), revamped layout/structure to remove parens (etc) for the aside, then added further consideration in parens!)2022-10-11T08:18:21Z<p><span dir="auto"><span class="autocomment">Explanation: </span> Added xkcd 'authority' on "few", removed condecension, fulfilled 'citation needed' (the joke is fulfilled out of practicality), revamped layout/structure to remove parens (etc) for the aside, then added further consideration in parens!)</span></p>
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<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 08:18, 11 October 2022</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l12" >Line 12:</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Smartphones run on batteries that require frequent charging; they may also be frequently replaced with a newer model by their user, though battery life is only one of several reasons why they may do this. In this comic, instead of charging his phone every day for a few years and then buying a new phone, [[Cueball]] has obtained a phone with a battery big enough to last supposedly until the phone will be replaced after a few years. This appears to make for a phone of cumbersome weight and size. According to the caption, 10% of battery life corresponds to 1–2 months; this suggests a total battery life and hence product life of 10–20 months, which is <del class="diffchange diffchange-inline">not a few </del>years.<del class="diffchange diffchange-inline">{{Citation needed}} (For the mathematically and linguistically challenged, 20 months </del>is <del class="diffchange diffchange-inline">less than 2 years, and </del>[https://www.merriam-webster.com/words-at-play/couple-few-several-use <del class="diffchange diffchange-inline">a </del>'<del class="diffchange diffchange-inline">few</del>' <del class="diffchange diffchange-inline">is more than </del>a <del class="diffchange diffchange-inline">couple]</del>) <del class="diffchange diffchange-inline">However</del>, [https://www.forbes.com/sites/christopherhelman/2013/09/07/how-much-energy-does-your-iphone-and-other-devices-use-and-what-to-do-about-it/?sh=6f8e6fed2f70 a smartphone requires around 2 kWh per year], so this 12 kWh battery could have been expected to last longer. A 12 kWh battery weighing 100 pounds (45 kg) has an energy density of 264.6 Wh/kg, about equal to the high-estimate of the energy density of {{w|Lithium-ion battery|lithium-ion batteries}} of 100–265 Wh/kg. However, it is well below the practically achievable energy densities of (non-rechargeable, as befits the application) {{w|Zinc-air battery|zinc-air batteries}} at around 400 Wh/kg. Unfortunately, {{w|Self-discharge}} means that if this battery is lithium polymer, it will lose on average 5% of its charge per month, which totals to 46% lost each year. If this were a non rechargeable battery such a lithium metal, its battery life could be much longer.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Smartphones run on batteries that require frequent charging; they may also be frequently replaced with a newer model by their user, though battery life is only one of several reasons why they may do this. In this comic, instead of charging his phone every day for a few years and then buying a new phone, [[Cueball]] has obtained a phone with a battery big enough to last supposedly until the phone will be replaced after a few years. This appears to make for a phone of cumbersome weight and size. According to the caption, 10% of battery life corresponds to 1–2 months; this suggests a total battery life and hence product life of 10–20 months, which is <ins class="diffchange diffchange-inline">less than two </ins>years. <ins class="diffchange diffchange-inline">A 'few' </ins>is <ins class="diffchange diffchange-inline">generally </ins>[https://www.merriam-webster.com/words-at-play/couple-few-several-use <ins class="diffchange diffchange-inline">more than that], even in the [[1070: Words for Small Sets|world of xkcd]]. (This assumes that he'd be 'good</ins>' <ins class="diffchange diffchange-inline">right up until 0%. He could be just talking about being generally unconcerned until it reaches 5%, say, from which point he knows he</ins>'<ins class="diffchange diffchange-inline">ll have </ins>a <ins class="diffchange diffchange-inline">similar further amount of time to start seriously thinking about arranging the full replacement, and all that this entails.</ins>)</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">More practically</ins>, [https://www.forbes.com/sites/christopherhelman/2013/09/07/how-much-energy-does-your-iphone-and-other-devices-use-and-what-to-do-about-it/?sh=6f8e6fed2f70 a smartphone requires around 2 kWh per year], so this 12 kWh battery could have been expected to last longer. A 12 kWh battery weighing 100 pounds (45 kg) has an energy density of 264.6 Wh/kg, about equal to the high-estimate of the energy density of {{w|Lithium-ion battery|lithium-ion batteries}} of 100–265 Wh/kg. However, it is well below the practically achievable energy densities of (non-rechargeable, as befits the application) {{w|Zinc-air battery|zinc-air batteries}} at around 400 Wh/kg. Unfortunately, {{w|Self-discharge}} means that if this battery is lithium polymer, it will lose on average 5% of its charge per month, which totals to 46% lost each year. If this were a non rechargeable battery such a lithium metal, its battery life could be much longer.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>This comic appeared on [https://techxplore.com/news/2022-10-eu-lawmakers-impose-charger-smartphones.html the same day that the European Union standardized charging adapters for mobile phones.]</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>This comic appeared on [https://techxplore.com/news/2022-10-eu-lawmakers-impose-charger-smartphones.html the same day that the European Union standardized charging adapters for mobile phones.]</div></td></tr>
</table>141.101.99.32https://www.explainxkcd.com/wiki/index.php?title=2680:_Battery_Life&diff=296305&oldid=prev162.158.178.234: /* Explanation */2022-10-11T01:03:40Z<p><span dir="auto"><span class="autocomment">Explanation</span></span></p>
<table class="diff diff-contentalign-left" data-mw="interface">
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<td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 01:03, 11 October 2022</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l12" >Line 12:</td>
<td colspan="2" class="diff-lineno">Line 12:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>{{incomplete|Created by a BOT WITH ONE MONTH OF BATTERY LIFE LEFT. Do NOT delete this tag too soon.}}</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>{{incomplete|Created by a BOT WITH ONE MONTH OF BATTERY LIFE LEFT. Do NOT delete this tag too soon.}}</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Smartphones run on batteries that require frequent charging; they may also be frequently replaced with a newer model by their user, though battery life is only one of several reasons why they may do this. In this comic, instead of charging his phone every day for a few years and then buying a new phone, [[Cueball]] has obtained a phone with a battery big enough to last supposedly until the phone will be replaced after a few years. This appears to make for a phone of cumbersome weight and size. According to the caption, 10% of battery life corresponds to 1–2 months; this suggests a total battery life and hence product life of 10–20 months, which is not a few years.{{Citation needed}} However, [https://www.forbes.com/sites/christopherhelman/2013/09/07/how-much-energy-does-your-iphone-and-other-devices-use-and-what-to-do-about-it/?sh=6f8e6fed2f70 a smartphone requires around 2 kWh per year], so this 12 kWh battery could have been expected to last longer. A 12 kWh battery weighing 100 pounds (45 kg) has an energy density of 264.6 Wh/kg, about equal to the high-estimate of the energy density of {{w|Lithium-ion battery|lithium-ion batteries}} of 100–265 Wh/kg. However, it is well below the practically achievable energy densities of (non-rechargeable, as befits the application) {{w|Zinc-air battery|zinc-air batteries}} at around 400 Wh/kg. Unfortunately, {{w|Self-discharge}} means that if this battery is lithium polymer, it will lose on average 5% of its charge per month, which totals to 46% lost each year. If this were a non rechargeable battery such a lithium metal, its battery life could be much longer.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Smartphones run on batteries that require frequent charging; they may also be frequently replaced with a newer model by their user, though battery life is only one of several reasons why they may do this. In this comic, instead of charging his phone every day for a few years and then buying a new phone, [[Cueball]] has obtained a phone with a battery big enough to last supposedly until the phone will be replaced after a few years. This appears to make for a phone of cumbersome weight and size. According to the caption, 10% of battery life corresponds to 1–2 months; this suggests a total battery life and hence product life of 10–20 months, which is not a few years.{{Citation needed}} <ins class="diffchange diffchange-inline">(For the mathematically and linguistically challenged, 20 months is less than 2 years, and [https://www.merriam-webster.com/words-at-play/couple-few-several-use a 'few' is more than a couple]) </ins>However, [https://www.forbes.com/sites/christopherhelman/2013/09/07/how-much-energy-does-your-iphone-and-other-devices-use-and-what-to-do-about-it/?sh=6f8e6fed2f70 a smartphone requires around 2 kWh per year], so this 12 kWh battery could have been expected to last longer. A 12 kWh battery weighing 100 pounds (45 kg) has an energy density of 264.6 Wh/kg, about equal to the high-estimate of the energy density of {{w|Lithium-ion battery|lithium-ion batteries}} of 100–265 Wh/kg. However, it is well below the practically achievable energy densities of (non-rechargeable, as befits the application) {{w|Zinc-air battery|zinc-air batteries}} at around 400 Wh/kg. Unfortunately, {{w|Self-discharge}} means that if this battery is lithium polymer, it will lose on average 5% of its charge per month, which totals to 46% lost each year. If this were a non rechargeable battery such a lithium metal, its battery life could be much longer.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>This comic appeared on [https://techxplore.com/news/2022-10-eu-lawmakers-impose-charger-smartphones.html the same day that the European Union standardized charging adapters for mobile phones.]</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>This comic appeared on [https://techxplore.com/news/2022-10-eu-lawmakers-impose-charger-smartphones.html the same day that the European Union standardized charging adapters for mobile phones.]</div></td></tr>
</table>162.158.178.234https://www.explainxkcd.com/wiki/index.php?title=2680:_Battery_Life&diff=296139&oldid=prev172.71.178.65: /* Explanation */2022-10-06T11:58:59Z<p><span dir="auto"><span class="autocomment">Explanation</span></span></p>
<table class="diff diff-contentalign-left" data-mw="interface">
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<td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 11:58, 6 October 2022</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l12" >Line 12:</td>
<td colspan="2" class="diff-lineno">Line 12:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>{{incomplete|Created by a BOT WITH ONE MONTH OF BATTERY LIFE LEFT. Do NOT delete this tag too soon.}}</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>{{incomplete|Created by a BOT WITH ONE MONTH OF BATTERY LIFE LEFT. Do NOT delete this tag too soon.}}</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Smartphones run on batteries that require frequent charging; they may also be frequently replaced with a newer model by their user, though battery life is only one of several reasons why they may do this. In this comic, instead of charging his phone every day for a few years and then buying a new phone, [[Cueball]] has obtained a phone with a battery big enough to last supposedly until the phone will be replaced after a few years. This appears to make for a phone of cumbersome weight and size. According to the caption, 10% of battery life <del class="diffchange diffchange-inline">correspondents </del>to 1–2 months; this suggests a total battery life and hence product life of 10–20 months, which is not a few years.{{Citation needed}} However, [https://www.forbes.com/sites/christopherhelman/2013/09/07/how-much-energy-does-your-iphone-and-other-devices-use-and-what-to-do-about-it/?sh=6f8e6fed2f70 a smartphone requires around 2 kWh per year], so this 12 kWh battery could have been expected to last longer. A 12 kWh battery weighing 100 pounds (45 kg) has an energy density of 264.6 Wh/kg, about equal to the high-estimate of the energy density of {{w|Lithium-ion battery|lithium-ion batteries}} of 100–265 Wh/kg. However, it is well below the practically achievable energy densities of (non-rechargeable, as befits the application) {{w|Zinc-air battery|zinc-air batteries}} at around 400 Wh/kg. Unfortunately, {{w|Self-discharge}} means that if this battery is lithium polymer, it will lose on average 5% of its charge per month, which totals to 46% lost each year. If this were a non rechargeable battery such a lithium metal, its battery life could be much longer.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Smartphones run on batteries that require frequent charging; they may also be frequently replaced with a newer model by their user, though battery life is only one of several reasons why they may do this. In this comic, instead of charging his phone every day for a few years and then buying a new phone, [[Cueball]] has obtained a phone with a battery big enough to last supposedly until the phone will be replaced after a few years. This appears to make for a phone of cumbersome weight and size. According to the caption, 10% of battery life <ins class="diffchange diffchange-inline">corresponds </ins>to 1–2 months; this suggests a total battery life and hence product life of 10–20 months, which is not a few years.{{Citation needed}} However, [https://www.forbes.com/sites/christopherhelman/2013/09/07/how-much-energy-does-your-iphone-and-other-devices-use-and-what-to-do-about-it/?sh=6f8e6fed2f70 a smartphone requires around 2 kWh per year], so this 12 kWh battery could have been expected to last longer. A 12 kWh battery weighing 100 pounds (45 kg) has an energy density of 264.6 Wh/kg, about equal to the high-estimate of the energy density of {{w|Lithium-ion battery|lithium-ion batteries}} of 100–265 Wh/kg. However, it is well below the practically achievable energy densities of (non-rechargeable, as befits the application) {{w|Zinc-air battery|zinc-air batteries}} at around 400 Wh/kg. Unfortunately, {{w|Self-discharge}} means that if this battery is lithium polymer, it will lose on average 5% of its charge per month, which totals to 46% lost each year. If this were a non rechargeable battery such a lithium metal, its battery life could be much longer.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>This comic appeared on [https://techxplore.com/news/2022-10-eu-lawmakers-impose-charger-smartphones.html the same day that the European Union standardized charging adapters for mobile phones.]</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>This comic appeared on [https://techxplore.com/news/2022-10-eu-lawmakers-impose-charger-smartphones.html the same day that the European Union standardized charging adapters for mobile phones.]</div></td></tr>
</table>172.71.178.65https://www.explainxkcd.com/wiki/index.php?title=2680:_Battery_Life&diff=296138&oldid=prev172.71.178.65: /* Explanation */2022-10-06T11:58:20Z<p><span dir="auto"><span class="autocomment">Explanation</span></span></p>
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<td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 11:58, 6 October 2022</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l12" >Line 12:</td>
<td colspan="2" class="diff-lineno">Line 12:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>{{incomplete|Created by a BOT WITH ONE MONTH OF BATTERY LIFE LEFT. Do NOT delete this tag too soon.}}</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>{{incomplete|Created by a BOT WITH ONE MONTH OF BATTERY LIFE LEFT. Do NOT delete this tag too soon.}}</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Smartphones run on batteries that require frequent charging; they may also be frequently replaced with a newer model by their user, though <del class="diffchange diffchange-inline">for various reasons other than the </del>battery life. In this comic, instead of charging his phone every day for a few years and then buying a new phone, [[Cueball]] has obtained a phone with a battery big enough to last supposedly until the phone will be replaced after a few years. This appears to make for a phone of cumbersome weight and size. According to the caption, 10% of battery life correspondents to 1–2 months; this suggests a total battery life and hence product life of 10–20 months, which is not a few years.{{Citation needed}} However, [https://www.forbes.com/sites/christopherhelman/2013/09/07/how-much-energy-does-your-iphone-and-other-devices-use-and-what-to-do-about-it/?sh=6f8e6fed2f70 a smartphone requires around 2 kWh per year], so this 12 kWh battery could have been expected to last longer. A 12 kWh battery weighing 100 pounds (45 kg) has an energy density of 264.6 Wh/kg, about equal to the high-estimate of the energy density of {{w|Lithium-ion battery|lithium-ion batteries}} of 100–265 Wh/kg. However, it is well below the practically achievable energy densities of (non-rechargeable, as befits the application) {{w|Zinc-air battery|zinc-air batteries}} at around 400 Wh/kg. Unfortunately, {{w|Self-discharge}} means that if this battery is lithium polymer, it will lose on average 5% of its charge per month, which totals to 46% lost each year. If this were a non rechargeable battery such a lithium metal, its battery life could be much longer.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Smartphones run on batteries that require frequent charging; they may also be frequently replaced with a newer model by their user, though battery life <ins class="diffchange diffchange-inline">is only one of several reasons why they may do this</ins>. In this comic, instead of charging his phone every day for a few years and then buying a new phone, [[Cueball]] has obtained a phone with a battery big enough to last supposedly until the phone will be replaced after a few years. This appears to make for a phone of cumbersome weight and size. According to the caption, 10% of battery life correspondents to 1–2 months; this suggests a total battery life and hence product life of 10–20 months, which is not a few years.{{Citation needed}} However, [https://www.forbes.com/sites/christopherhelman/2013/09/07/how-much-energy-does-your-iphone-and-other-devices-use-and-what-to-do-about-it/?sh=6f8e6fed2f70 a smartphone requires around 2 kWh per year], so this 12 kWh battery could have been expected to last longer. A 12 kWh battery weighing 100 pounds (45 kg) has an energy density of 264.6 Wh/kg, about equal to the high-estimate of the energy density of {{w|Lithium-ion battery|lithium-ion batteries}} of 100–265 Wh/kg. However, it is well below the practically achievable energy densities of (non-rechargeable, as befits the application) {{w|Zinc-air battery|zinc-air batteries}} at around 400 Wh/kg. Unfortunately, {{w|Self-discharge}} means that if this battery is lithium polymer, it will lose on average 5% of its charge per month, which totals to 46% lost each year. If this were a non rechargeable battery such a lithium metal, its battery life could be much longer.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>This comic appeared on [https://techxplore.com/news/2022-10-eu-lawmakers-impose-charger-smartphones.html the same day that the European Union standardized charging adapters for mobile phones.]</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>This comic appeared on [https://techxplore.com/news/2022-10-eu-lawmakers-impose-charger-smartphones.html the same day that the European Union standardized charging adapters for mobile phones.]</div></td></tr>
</table>172.71.178.65https://www.explainxkcd.com/wiki/index.php?title=2680:_Battery_Life&diff=296092&oldid=prevKynde: /* Transcript */ complete2022-10-05T13:31:23Z<p><span dir="auto"><span class="autocomment">Transcript: </span> complete</span></p>
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<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 13:31, 5 October 2022</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l24" >Line 24:</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>==Transcript==</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>==Transcript==</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del class="diffchange diffchange-inline">{{incomplete transcript|Do NOT delete this tag too soon</del>.<del class="diffchange diffchange-inline">}}</del></div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">:[Cueball is seen carrying a large box</ins>. <ins class="diffchange diffchange-inline">He is shown three times as he seems to turn and walk to the right in the same panel. He has trouble reaching around the box. In the first version a label can be seen at the bottom of the box, which indicated it is a huge battery. There are also unreadable text at the top. Cueball holds it in front of him, covering his torso and partly obscuring his head. In the second version he has turned to the right, and reveals that on the other side of the box there is a small phone in the middle with a keyboard. In the last version he has turned fully and it looks like he is walking to the right, but could also be that he is just leaning back to support the weight of the box. He is operating the phone with a free hand while he holds the box with the other hand, and are thus forced to lean it against his head for support.]</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">:Label: 12 kWh</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>:[<del class="diffchange diffchange-inline">Cueball carries a gigantic battery with a phone in it in three different positions in frame.]</del></div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>:[<ins class="diffchange diffchange-inline">Caption beneath the panel</ins>:]  </div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del class="diffchange diffchange-inline">:[Text on battery in first image</del>:] <del class="diffchange diffchange-inline">12 kWh</del></div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>:Plugging in my phone is a pain, so I got one with a 100lb battery, and when it runs out of charge every few years I just upgrade.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>:<del class="diffchange diffchange-inline">[Caption:] </del>Plugging in my phone is a pain, so I got one with a 100lb battery, and when it runs out of charge every few years I just upgrade.</div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>{{comic discussion}}</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>{{comic discussion}}</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[Category:Comics featuring Cueball]]</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[Category:Smartphones]]</ins></div></td></tr>
</table>Kyndehttps://www.explainxkcd.com/wiki/index.php?title=2680:_Battery_Life&diff=296088&oldid=prev172.71.178.65: /* Explanation */ punc2022-10-05T09:35:19Z<p><span dir="auto"><span class="autocomment">Explanation: </span> punc</span></p>
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<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 09:35, 5 October 2022</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l16" >Line 16:</td>
<td colspan="2" class="diff-lineno">Line 16:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>This comic appeared on [https://techxplore.com/news/2022-10-eu-lawmakers-impose-charger-smartphones.html the same day that the European Union standardized charging adapters for mobile phones.]</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>This comic appeared on [https://techxplore.com/news/2022-10-eu-lawmakers-impose-charger-smartphones.html the same day that the European Union standardized charging adapters for mobile phones.]</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>This may be a commentary on very large external portable charging devices. At present (October, 2022) the largest cell-phone sized charging devices [https://www.amazon.com/dp/B09H4GLZXT/ hold almost 40000mAh and can weigh almost a pound]. Even [https://www.amazon.com/Jackery-Explorer-Portable-capacity-Emergency/dp/B0B8ZLZ53M larger devices are available weighing over 40 lbs] in different form factors. We buy cell phones because of their small size and convenience{{Citation needed}}<del class="diffchange diffchange-inline">, </del>and end up buying extra external battery power for them that adds significant extra weight and bulk.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>This may be a commentary on very large external portable charging devices. At present (October, 2022) the largest cell-phone sized charging devices [https://www.amazon.com/dp/B09H4GLZXT/ hold almost 40000mAh and can weigh almost a pound]. Even [https://www.amazon.com/Jackery-Explorer-Portable-capacity-Emergency/dp/B0B8ZLZ53M larger devices are available weighing over 40 lbs] in different form factors. We buy cell phones because of their small size and convenience<ins class="diffchange diffchange-inline">,</ins>{{Citation needed}} and end up buying extra external battery power for them that adds significant extra weight and bulk.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>[https://microgreen.ca/energypak-lithium-batteries Portable (on wheels) 12 kWh lithium-ion batteries] do exist but typically weigh over 250 lbs and tend to lack ports to plug a phone directly into. Roughly 100 lb portable power stations can have capacities as high as [https://www.goalzero.com/collections/portable-power-stations/products/goal-zero-yeti-6000x-portable-power-station 6 kWh] and can be used to charge a typical smartphone directly hundreds of times.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>[https://microgreen.ca/energypak-lithium-batteries Portable (on wheels) 12 kWh lithium-ion batteries] do exist but typically weigh over 250 lbs and tend to lack ports to plug a phone directly into. Roughly 100 lb portable power stations can have capacities as high as [https://www.goalzero.com/collections/portable-power-stations/products/goal-zero-yeti-6000x-portable-power-station 6 kWh] and can be used to charge a typical smartphone directly hundreds of times.</div></td></tr>
</table>172.71.178.65https://www.explainxkcd.com/wiki/index.php?title=2680:_Battery_Life&diff=296087&oldid=prev172.70.211.146: /* Explanation */ adjust per likelihood2022-10-05T07:35:17Z<p><span dir="auto"><span class="autocomment">Explanation: </span> adjust per likelihood</span></p>
<table class="diff diff-contentalign-left" data-mw="interface">
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<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 07:35, 5 October 2022</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l13" >Line 13:</td>
<td colspan="2" class="diff-lineno">Line 13:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>Smartphones run on batteries that require frequent charging; they may also be frequently replaced with a newer model by their user, though for various reasons other than the battery life. In this comic, instead of charging his phone every day for a few years and then buying a new phone, [[Cueball]] has obtained a phone with a battery big enough to last supposedly until the phone will be replaced after a few years. This appears to make for a phone of cumbersome weight and size. According to the caption, 10% of battery life correspondents to 1–2 months; this suggests a total battery life and hence product life of 10–20 months, which is not a few years.{{Citation needed}} However, [https://www.forbes.com/sites/christopherhelman/2013/09/07/how-much-energy-does-your-iphone-and-other-devices-use-and-what-to-do-about-it/?sh=6f8e6fed2f70 a smartphone requires around 2 kWh per year], so this 12 kWh battery could have been expected to last longer. A 12 kWh battery weighing 100 pounds (45 kg) has an energy density of 264.6 Wh/kg, about equal to the high-estimate of the energy density of {{w|Lithium-ion battery|lithium-ion batteries}} of 100–265 Wh/kg. However, it is well below the practically achievable energy densities of (non-rechargeable, as befits the application) {{w|Zinc-air battery|zinc-air batteries}} at around 400 Wh/kg. Unfortunately, {{w|Self-discharge}} means that if this battery is lithium polymer, it will lose on average 5% of its charge per month, which totals to 46% lost each year. If this were a non rechargeable battery such a lithium metal, its battery life could be much longer.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>Smartphones run on batteries that require frequent charging; they may also be frequently replaced with a newer model by their user, though for various reasons other than the battery life. In this comic, instead of charging his phone every day for a few years and then buying a new phone, [[Cueball]] has obtained a phone with a battery big enough to last supposedly until the phone will be replaced after a few years. This appears to make for a phone of cumbersome weight and size. According to the caption, 10% of battery life correspondents to 1–2 months; this suggests a total battery life and hence product life of 10–20 months, which is not a few years.{{Citation needed}} However, [https://www.forbes.com/sites/christopherhelman/2013/09/07/how-much-energy-does-your-iphone-and-other-devices-use-and-what-to-do-about-it/?sh=6f8e6fed2f70 a smartphone requires around 2 kWh per year], so this 12 kWh battery could have been expected to last longer. A 12 kWh battery weighing 100 pounds (45 kg) has an energy density of 264.6 Wh/kg, about equal to the high-estimate of the energy density of {{w|Lithium-ion battery|lithium-ion batteries}} of 100–265 Wh/kg. However, it is well below the practically achievable energy densities of (non-rechargeable, as befits the application) {{w|Zinc-air battery|zinc-air batteries}} at around 400 Wh/kg. Unfortunately, {{w|Self-discharge}} means that if this battery is lithium polymer, it will lose on average 5% of its charge per month, which totals to 46% lost each year. If this were a non rechargeable battery such a lithium metal, its battery life could be much longer.</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">This comic appeared on [https://techxplore.com/news/2022-10-eu-lawmakers-impose-charger-smartphones.html the same day that the European Union standardized charging adapters for mobile phones.]</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>This may be a commentary on very large external portable charging devices. At present (October, 2022) the largest cell-phone sized charging devices [https://www.amazon.com/dp/B09H4GLZXT/ hold almost 40000mAh and can weigh almost a pound]. Even [https://www.amazon.com/Jackery-Explorer-Portable-capacity-Emergency/dp/B0B8ZLZ53M larger devices are available weighing over 40 lbs] in different form factors. We buy cell phones because of their small size and convenience{{Citation needed}}, and end up buying extra external battery power for them that adds significant extra weight and bulk.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>This may be a commentary on very large external portable charging devices. At present (October, 2022) the largest cell-phone sized charging devices [https://www.amazon.com/dp/B09H4GLZXT/ hold almost 40000mAh and can weigh almost a pound]. Even [https://www.amazon.com/Jackery-Explorer-Portable-capacity-Emergency/dp/B0B8ZLZ53M larger devices are available weighing over 40 lbs] in different form factors. We buy cell phones because of their small size and convenience{{Citation needed}}, and end up buying extra external battery power for them that adds significant extra weight and bulk.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>[https://microgreen.ca/energypak-lithium-batteries Portable (on wheels) 12 kWh lithium-ion batteries] do exist but typically weigh over 250 lbs and tend to lack ports to plug a phone directly into. Roughly 100 lb portable power stations can have capacities as high as [https://www.goalzero.com/collections/portable-power-stations/products/goal-zero-yeti-6000x-portable-power-station 6 kWh] and can be used to charge a typical smartphone directly hundreds of times.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>[https://microgreen.ca/energypak-lithium-batteries Portable (on wheels) 12 kWh lithium-ion batteries] do exist but typically weigh over 250 lbs and tend to lack ports to plug a phone directly into. Roughly 100 lb portable power stations can have capacities as high as [https://www.goalzero.com/collections/portable-power-stations/products/goal-zero-yeti-6000x-portable-power-station 6 kWh] and can be used to charge a typical smartphone directly hundreds of times.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;"></del></div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">This comic appeared on [https://techxplore.com/news/2022-10-eu-lawmakers-impose-charger-smartphones.html the same day that the European Union standardized charging adapters for mobile phones.]</del></div></td><td colspan="2"> </td></tr>
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</table>172.70.211.146https://www.explainxkcd.com/wiki/index.php?title=2680:_Battery_Life&diff=296086&oldid=prev172.69.22.227: /* Explanation */ fix link2022-10-05T06:56:07Z<p><span dir="auto"><span class="autocomment">Explanation: </span> fix link</span></p>
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<td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 06:56, 5 October 2022</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>[https://microgreen.ca/energypak-lithium-batteries Portable (on wheels) 12 kWh lithium-ion batteries] do exist but typically weigh over 250 lbs and tend to lack ports to plug a phone directly into. Roughly 100 lb portable power stations can have capacities as high as [https://www.goalzero.com/collections/portable-power-stations/products/goal-zero-yeti-6000x-portable-power-station 6 kWh] and can be used to charge a typical smartphone directly hundreds of times.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>[https://microgreen.ca/energypak-lithium-batteries Portable (on wheels) 12 kWh lithium-ion batteries] do exist but typically weigh over 250 lbs and tend to lack ports to plug a phone directly into. Roughly 100 lb portable power stations can have capacities as high as [https://www.goalzero.com/collections/portable-power-stations/products/goal-zero-yeti-6000x-portable-power-station 6 kWh] and can be used to charge a typical smartphone directly hundreds of times.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>This comic appeared on [<del class="diffchange diffchange-inline">the same day that the European Union standardized charging adapters for mobile phones. </del>https://techxplore.com/news/2022-10-eu-lawmakers-impose-charger-smartphones.html]</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>This comic appeared on [https://techxplore.com/news/2022-10-eu-lawmakers-impose-charger-smartphones.html <ins class="diffchange diffchange-inline">the same day that the European Union standardized charging adapters for mobile phones.</ins>]</div></td></tr>
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