One question I see come up fairly often is people asking why their Kindle stops charging before the battery meter hits 100%.
Some people get really frustrated by this for some reason, and they assume it means their Kindle’s battery is no longer any good and it’s starting to go bad, but that isn’t the case at all.
It’s entirely normal for a Kindle to stop charging before the meter hits 100%. Even brand new Kindles. They might stop charging at around 96% or 97%, give or take a percentage point or two, and it’s has been that way for several years now.
In fact, it’s been well established that fully charging lithium ion batteries all the time is not good for them—it shortens their lifespan. Most experts advise keeping batteries charged between 20% and 80% to help maximize their lifespan.
It’s also normal for Kindles to start charging slower once they hit a certain percentage; they charge a lot faster at lower percentages than higher.
You might notice your Kindle’s charging indicator turn green well before the battery meter hits 100%, and that’s entirely normal too. The green light might turn on around 94% or so, and the device will continue charging slowly even when the light is green.
Occasionally, if you leave your Kindle plugged in long enough, the battery meter can hit 100%, but there’s really no point in doing that, and it might be doing more harm than good in the long run. You’re better off not topping off the battery all the time.
I don’t know why the Kindle software developers don’t just make the battery meter say 100% when a device is charged enough to be considered fully charged—it’s not like battery meters are perfectly accurate anyway, even though most people seem to think they are. It just leads to a lot of needless confusion.