iPh15PM battery health dropped to 99% in 1 month
OS software: 17.4.1
battery health dropped to 99% in 1 month (i bought it last March 1), charging habit: 30/40% to 80% only then I unplug it. I sometimes use it while charging or my cellular data is on while charging.
Is this normal??
iPhone 15 Pro Max, iOS 17