It depends on how many charge cycles your phone goes through. Battery health will deteriorate after time and it’s absolutely normal.

Overcharging the phone is the no 1 cause of battery degradation.

Optimized Battery Charging you mean?

Yeap. There is truth to that. Since we change phone ever so often.....

Overcharging above 85% is considered to be non beneficial to lithium ion batteries. The characteristics of lithium ion batteries would be that it doesn't prefer below 20% battery level and over 85% battery level. So charging it over this point would be considered overcharging it.

No, your phone doesn't really stop charging when it reaches 100% battery level. The phone would trickle charge the phone from 80% onwards till it reaches 100%, stop the charge and then continue to top up to 100% once the battery levels drop, if your phone is plugged in.

If you want to do that, you could get charging cables which would automatically stop charging once it reaches 100%. McDODO cables are one of the brands which produces cables with such features.

This post has been edited by TOMEI-R: Jul 14 2020, 12:24 PM