Extreme Battery Drain After iOS 18.3.1 Update on iPhone 12
Since updating my iPhone 12 to iOS 18.3.1 a week ago, it has been experiencing extreme battery drain, noticeably overnight when the phone is not in use. Before the update, battery life was completely fine. Battery health is 89%.
I tried these troubleshooting steps that I found on here:
- Restarting, multiple times
- Checking Battery Usage in Settings (nothing unusual)
- Ensured that no apps are open overnight
- Disabling Background App Refresh
-Checked that Location Services for unnecessary apps is off
- Checked that Always-On Display is off
- Checking for rogue apps or unusual battery drain in the Battery section
- Checked that no unnecessary widgets or Live Activities are running
- Checked that Optimised Battery Charging is enabled
- Turning off Bluetooth and Wi-Fi overnight to see if it makes a difference
Despite all this, the battery continues to drain really fast compared to before the update (the second screenshot was last night).
Has anyone else experienced this issue? Any other solutions before I consider a full reset?
Thanks in advance!
iPhone 12
