Massive battery drain with iOS 13.3.1, iPhone 7+ : r/ios
iOS 13.4 Battery Life Drain Comparison Against iOS 13.3.1 | Redmond Pie
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