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
5 Reasons Why You Shouldn't Install iOS 16 on Your iPhone Just Yet « iOS & iPhone :: Gadget Hacks
My iPhone 13 Pro and its ultra-short battery life – The Robservatory