Why does charging a phone battery to 100% keep the discharge rate slower than charging to 90 or 80%?

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I have experienced it on multiple mobile phones and my laptop. If i charge the battery to 100% the discharge to 99% is way slower than if i charge the battery to 90% and discharge to 89%. And this makes me charge the battery to 100% even when I know that it is bad for the battery just because the charge lasts much longer than charging to 90 or 80%. Is it related to some kind of chemistry?

I am ok with eli 20 also. Thanks.

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6 Answers

Anonymous 0 Comments

Charging it all the way to 100 and draining it to 0 puts a lot of stress.on the battery. Keeping it between 80 and 20 is a lot less stress. It’s like bending a paper clip back and forth, the more you do it, it eventually breaks. If we don’t bend it as far, it’s less stress, and the stress is highest at the extremes.

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