Otherfamily members are also experiencing this on series 5/6 after the 8.5.1 update. The Apple support forum is full of these reported issues. There are unconfirmed reports that Apple initiated a new power management IC test that disables the chip if it doesn’t pass, resulting in drastically reduced battery life.
Haveyou ever wondered exactly how long the series 7 battery lasts?! Well, you're in luck because I wore my apple watch series 7 from 100% all the way to 0% and
1:35 PM in response to Sandkae. My husband has iPhone 11 pro Max. Ambient light sensor has faulted so serious battery drainage. Sent it in to get it fixed but is told that because the fluid indicator had turned red. Now they refuse to repair it and wants to exchange the phone. For the neat price of $800.