Also IOS 15 beta 5 still have big battery drain, 5% per h.. nothing new... When you repair this bug. I have Iphone XS. This is happened from 14.6.1. Regards Jani
IOS 15 beta 5 battery drain
Same problem here, except it seems mainly to happen when I have WiFi turned on. Just now it went from 100% to 5% in about 10 seconds when I turned on the WiFi. I have iPhone 6SE.