Should I Drain My Phone Battery Before Charging. You should always let the battery drain completely. Continuous charge for 4 days or more.
The cells can actually be permanently damaged by one truly complete discharge eg. Technically you should not be charging your phone for extended spans of. A battery functions best when its kept between 40 and 80.
Theres a built-in safety factor so if you let it go to zero then charge it immediately.
If you dont fully discharge before recharging the battery forgets its full capacity. As long as there is a relatively steady amount of charge within the battery this cycling causes little wear on the internal architecture of the battery. However not everyone can follow the 20 80 rule to have a. When it reaches zero the phone will shut off but that zero is not fully discharged.
