I’ve had my phone for 8 months and my battery life has terribly decreased since ios 16. With the recent update, my battery health decreases by 1% per week 🙃. 13 Pro Max has been draining like crazy since the update, full charge to 40-60% overnight with zero activity and 10% background app usage. Phone is also extremely hot in the morning
Amount of Charging cycles. "fast" charging or charging your iPhone with an iPad charger will generate more heat = over time faster decrease of battery capacity. Letting your iPhone die entirely (0%) Charging your iPhone to 100% every cycle. (Above 90% the iPhone will charge slower as the battery goes towards the 100%. To decrease heat build up.)
The battery could predate purchase by several months, so it would be 14 months + however long the phone was stored. You can check battery manufacture date, cycles and SoH with CoconutBattery on a Mac. But yes, 9 hours screen time is an awful lot. Reply. This-Professor9018 •. STOP Charging Your iPhone Past 80%! iphone 6s battery performance vs health iPhone 6s battery (still on iOS 13.4.1) has been performing poorly for a month now but battery health setting still states 89% of maximum capacity. The on-screen battery % charge drops quickly with normal use of various apps in 2-5% spurts and eventually reaches 1% but then weirdly stays at 1% for quite Iphone 12 pro battery health declining very quick!!! I got Iphone 12 pro in July 2021 and my battery health today is 89%. In the first 6-7 months, battery health stayed at 100% and then started declining and touched 95% by June 2022. And now in 1 month and a few days, it has dropped to 89%. I only use Iphone's original adapter and cable that Wbwc.
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    • iphone 11 pro battery health dropping fast