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User profile for user: Deniezu
Deniezu Author
User level: Level 1
4 points

iPhone 12 battery drains fast overnight

I bought the iPhone 12 a few days ago and didn’t have any problems. But last night the battery drained about 30% overnight, while not using my phone. It’s the first night it drained so fast.

I have installed iOs 14.4 at the moment. I’ve read this is probably a software problem which started months ago. Are they busy on fixing it? Or could this be another problem to my phone?

Is there a way I can fix this myself?

iPhone 12, iOS 14

Posted on Feb 26, 2021 12:56 AM

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2 replies
User profile for user: SravanKrA
SravanKrA
Community+ 2024
User level: Level 10
414,064 points

Feb 26, 2021 2:06 AM in response to Deniezu

Protect & Prolong life of your iPhone's Battery:

  1. About the battery usage on your iPhone, iPad, and iPod touch ...
  2. Batteries - Maximising Performance - Apple (IN)
  3. iPhone Battery and Performance



Try some of these options too.

  1. Avoid Screen Mirroring
  2. Put on Low Power Mode
  3. Put Auto-Lock on (1 min):- with low power mode it will be 30 Sec
  4. Put Auto Answer Off
  5. Disable Push notifications for apps you do not use often
  6. Keep your iPhone Facedown to prevent notifications to light up the screen
  7. Enable Auto-Brightness:- Settings > General > Accessibility > Display Accommodations > Auto-Brightness [Enable]
  8. Manually lower brightness from Control Center
  9. If you Want to watch continuous Video. Stream it on TV or a Monitor
  10. Don't force close apps; Apps which are not on frontend screen are paused by the system to save energy. Apps require more energy to re-launch. Apps which are open in the background use large memory is a myth and quitting them is counterproductive
  11. Location services to be allowed only while using the app
  12. Set your iPhone to fetch email and calendar data from internet less frequently
  13. Turning off Background App Refresh 
  14. Charge before it drops below 20-30%
  15. Try connecting to trusted Wifi wherever available instead of Cellular
  16. Enable Airplane mode in areas with bad cellular and wifi coverage. Your phone keeps trying for reconnection with the missing/weak network. This uses a lot of energy
  17. Switch off Wifi & Bluetooth while in Roaming or Not in Range
  18. Enable "Wifi Assist" : Settings > Cellular or Settings > Mobile Data > Wi-Fi Assist [Enable]
  19. Periodically Check the Battery Health (Settings > Battery > Battery Health)


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iPhone 12 battery drains fast overnight

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