Quote:
Originally Posted by Aleron Ives
Heat is only part of the problem. Lithium-ion batteries are also stressed when their voltage is too high (100% charged) for long periods of time, which causes the batteries to degrade faster. See here:
https://batteryuniversity.com/articl...ased-batteries
The worst case scenario is storing the battery at 100% charge in a hot environment. Even though you're not using the battery at all, the capacity will rapidly decline. |
Just because the battery meter says 100%, it doesn't mean the battery is fully charged. Last I checked it, on the Kindle "100%" means about 85%. This prevents damage due to overcharging. (There is a similar barrier in the way of undercharging, for similar reasons.)
So there is little harm in fully charging a Kindle: it's just a bit of a waste of time if it's already almost charged. Most battery aging (as with almost all li-ion batteries with a competent charging circuit in the loop) is going to be due to oxidation, and you can't really avoid that as long as you like living on a planet where you can breathe.