30 Fixes to Instantly Stop Your iPhone Battery from Draining Fast – PITAKA
iOS 13.2.2 now available with fix for background app performance, more - 9to5Mac
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
Battery drain & iOS 13.3 | MacRumors Forums
After updating to iOS 13, my iPhone battery is draining very fast. How can I improve the battery life now? - Quora