I always hear that it’s bad for lithium batteries to charge over 90% or over 90% so why is there no setting to stop charging after a certain threshold on my phone, kindle, pc or e-skate?

Question

I always hear that it’s bad for lithium batteries to charge over 90% or over 90% so why is there no setting to stop charging after a certain threshold on my phone, kindle, pc or e-skate?

In: 129

Answer 1

Most devices do, in fact, have such a setting.

All devices balance total used capacity, charging speed, and battery life. With a laptop, you can usually choose which you want. Some phones allow you to, too. Probably, other stuff (like your e-skate, possibly your Kindle) just have whatever compromise their engineers decided was best.

For most customers, long time between charges is more important than long battery life, so engineers tend to go in that direction. Industrial applications often go the other way.