iPhone 12 abnormal battery drain / SHORT battery life
I bought iPhone 12 couple of weeks ago, and it didn't take me long to realize that the device is draining 20-30% each night (during a period of 7 hrs) on idle, which is very frustrating. I took it to the Genius Bar several days ago and the technicians there are perplexted and couldn't find the cause of the problem (no hardware issue). They offered a few suggestions (change a few settings) for me to test for the following days, and also offered to replace my device with a service unit, should the suggestions fail to solve the severe battery drain. I have been searching about this issue and found out that a lot of people (in USA, China and seemingly many other countries) are suffering from this excessive battery discharge issue with their brand new iPhone 12/12 Pro.
Below are some of the sugestive solutions I have collected, some of them given by Apple (non-working), and some of them given by iPhone users (some reported to be effective).
For the past few days I have been testing these solutions one by one night by night and here's what I got so far,
- Turn off background app refresh (negligibly reduced battery drain)
- Close all of the opened apps before sleep (negligibly reduced battery drain)
- Update to IOS 14.2 (Not helpful)
- Sign out iCould and sign in again (Not helpful)
- Delete the built-in mail app (Not helpful)
- Reset network settings (Not helpful)
- Erase the iPhone and restore from a backup (Not helpful)
- Charge the phone while sleeping (it's a workaround but NOT a fix)
- Switch-off one of the two lines I'm using (will be tested today)
- Use airplane mode before sleep (will be tested day after tmr)
Further, as you may already know, the battery graph shows nothing happened during the night (no apps no activity) and yet the battery drains 20-30 pct each night on idle.
In addition, I really don't think my iPhone 12's overal battery life is good enough, I am a LIGHT-moderate phone user, for example you may see from below last screenshot that I got a bit over 6 hours of screen-on time last Saturday and it consumed roughly 90 pct of battery, and that seems to be a best day for battery life efficiency, do you think it's nornal ? I think it is worse than the iPhone 11 and on-par with the iPhone SE 2020. So, I think, maybe the irregular battery drain of iPhone 12 consistantly exits during the whole day 24/7. And that is unacceptable.
Do let me know if you have the same issue or if you have found a workable solution.
iPhone 12, iOS 14
