So I was surprised they had an OS update to my iPhone 6S knowing it was locked out of OS updates with the 16.0 land. New one was 15.7.3. Installed it right away. Few days later I noticed it was draining the battery way, way more than it should. I don’t use the phone all that much and typically put it on a charge overnight. Beginning of the day it’s 100% battery, by the time I go to bed it’s 70-80% charged. After 15.7.3 I found it running 20-25% charge after a day’s (non)use where I may only go to the phone for a OTC application a few times. BUT yesterday I noticed a return to normal behavior, 75% charge when I hit the pillow. Got a sneaky feeling it might have been one of the once a decade stealth updates where they tell no one. Anyone got any information that this was in fact, the case?
A larger question is I have seen a number of times where some new OS update caused way more battery use than normal. At this stage of the OS’s lifetime how can this happen? Sloppy Q&A (or less and less Q&A testers ti increase profit by cutting expenses) is about the only reason I can think of… anyone got other ideas?