Understanding iPhone battery health
Battery health has been a big crisis out there, we keep wondering what's happening to my iPhone? my battery health keeps dropping within a month it drops to 99%, within two months it drops to 98%, within 5months it might drop to 95%, its normal, that's the reason your 15series came with battery cycle count. As 25x fully charged will deduct your BH with 1% while 50x fully charged will deduct it by 2%. we have 30days in a month, imagine u keep charging your mobile phone full everyday, then it counts 1 daily for 25days u already lost a BH and in 60days u lost 2 BH🤣
Advice: avoid getting your mobile fully charged and also avoid it getting drained completely.
iPhone 15 Pro Max, iOS 17