Typically, anything below 80% battery health is weak, anything under 70% is very weak. You could still use the iPhone at 76%, but the iPhone might get unexpected shutdowns due to a weak battery.. if this happens, then the iOS software will automat
Which iPhone has the best battery health?
iPhone 13 Pro Max Most should get at least a day-and-a-half per charge, but two days isn't out of the question if your usage is a bit lighter. Plain and simple, the iPhone 13 Pro Max boasts the best battery life you'll find on an iPhone.29 Nov 2021