this post was submitted on 14 Jun 2025
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technically it's optimal for battery health if you only keep charge somewhere between 40 and 80%
Which is why my phone lies to me and 100% is actually 80%.
I use a setting on my S21 that keeps the battery from going over 80 for that reason. It does seem to help, battery's still going strong while my S8's has gone completely to shit.
40% is unnecessary conservative. More like 20%.
exactly, it's the recommendations for batteries for the last 10 years or more. people doing otherwise are following "old folklore" and killing their batteries faster.
The reality for most people is they charge their phone at night, and that's it. If the phone has a built in mechanism to stop charging at a certain percentage, you can use that, but otherwise it will just charge to 100%.
The only other option would be to have a smart outlet, and have your phone turn off the smart outlet when it hits 80%, which is an annoyance even if you know how to do it, and virtually impossible for tech illiterate people.
The next best thing is to make sure you aren't using a fast charger, as the heat from fast charging is arguably worse than charging it to 100%. And if it's charging over night, there is no reason for it to charge quickly.
Nah. Phones just gaslight you now.
https://urbo.com/content/this-is-why-your-phones-battery-isnt-really-at-100-percent/