Series 0 battery being killed since getting a new iPhone


macrumors 6502
Original poster
Mar 9, 2016
I had an iPhone SE running iOS 11.0.3 and my Series 0 38mm watch on WatchOS 4.0. Battery life was normal.

I then at the weekend got an iPhone 8, and then i paired the watch with my new iPhone, but since then my battery lasts about 5 hours, its eating 15%-20% an hour. I've checked for running Apps i don't have any running, when it runs out of battery its having a fresh boot.

Any idea how i find out whats causing this?


macrumors 65816
Sep 17, 2012
Did you restore your phone or setup as new? As if new then all that stuff to u turned off before like background app refresh is back on.