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Why Charging Your Gadgets Over 80% Is Such a Bad Idea | iFixit News (www.ifixit.com)

submitted 10 months ago by [email protected] to c/[email protected]

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[–] [email protected] 1 points 10 months ago

I don’t doubt the fact that they take some margin to extend the lifetime of the battery, but if we take iPhones as an example, they:

charge at a slower rate when nearing 100%
try to postpone charging the final 20% until the last moment before disconnecting from the wall outlet
can be software capped at 80% by the user (in newer models)

This makes me suspect that that the margin between what’s reported in software as 100% and the actual capacity of the battery is less than 20%. This also makes sense from the standpoint of the consumer expecting a long battery life on their expensive high-end device, putting pressure on the companies to make the margin smaller and the charging algorithms smarter. Just my observations, of course.