Help] WiFi idle energy battery drain. Woke up and phone was at 50% from 100%. I've had battery drain issues since updating to iOS 13.3 from 12.4 : r/jailbreak
iPhone users complain iOS 16 is a battery drain, has other issues
Download iOS 13.3.1 / iPadOS 13.3.1 with Bug Fixes for iPhone, iPad
Battery drain & iOS 13.3 | MacRumors Forums
Anyone else having battery drain issues? I have an iPhone 7 Plus running iOS 13.3.1 and I've randomly lost 20% battery in 5 mins. New OEM battery too. : r/ios
Apple fixes security vulnerabilities and bugs with iOS and macOS updates [Updated] | Cult of Mac
Battery drain overnight ios 13.3.1 iPhone 11 pro max issue : r/ios