hi, I bought an iphone 13 a week ago and the battery has gone very quickly and probably because I have read that many people run out of battery after the ios 15.6.1 update and is there any way to keep the initial duration?
iPhone 13, iOS 15
have you read
About the battery and performance of iPhone 11 and later - Apple
and maybe
iPhone Battery and Performance - Apple Support
and Batteries - Maximizing Performance - Apple
people report apple does not change
the batteries until they are lower than 80% in health
battery drain
