is it normal for an iphone battery to go down from 52% to 30% overnight on low power mode playing offline music. i’ve had this phone since October and it only started doing this recently about 2 weeks? is the battery weakening?
iPhone 13 Pro Max, iOS 16
Why are you not connecting the phone to the power adapter and leaving it connected all night.....every night? Read what Lawrence Fitch, a forum expert has to say:
There is never a time when any smartphone is doing nothing, so it will use energy 24/7, and the amount used will vary from day to day and minute to minute. For that reason alone you should charge your phone overnight, every night.
In addition, the absolute best way to get maximum use on a charge, as well as slow the decline of battery capacity long term is to enable Optimized Battery Charging (Settings/Battery/Battery Health) and charge the device overnight. The battery will fast charge to 80%, then pause. During the nighttime pause the phone will use mains power instead of battery power, allowing the battery to “rest”, and thus reducing the need to charge the battery quite as often.
The phone will resume charging to reach 100% when you are ready to use your phone; it will “learn” your usage pattern. If you enable iCloud Backup (Settings/[your name]/iCloud - iCloud Backup) the phone will back up overnight also, assuring that you can never lose more than the current day’s updates. Here's more information→About Optimized Battery Charging on your iPhone - Apple Support
I can't provide a technical analysis but given the scenario you describe I wouldn't think anything was unusual. Playing music for 8+ hours resulting in an 18% drain?
Yes. If i knew how to post screenshots of the analysis i would but i don’t know how🤷
Battery
