9% drop in battery health after 4 months
So i got my phone on 16 march 2024 and battery health was 99% and now on 30 june 2024 my battery health is 90% i am shock why my battery health is decreasing so fast
iPhone 14 Pro, iOS 17
If your signature if correct and you bought an iPhone 14 Pro in March, even if it was new, it had sat in an unopened box for at least 6 months, before you bought it. Apple discontinued iPhone 14 Pro in September 2023. As such an iPhone not charged for months would have already lost battery health as Lion Batteries do not like being uncharged for long periods of time. Give the phone would have been manufactured at the earliest in August 2023, the fact it has now lost 10% battery health in more than 10 months would not be unusual nor cause for concern.