@ work on Wifi? @ home on WiFi?
I have WiFi both places and yet the phone chooses to burn through battery looking for a cell phone tower?
My town doesn't have cell phone service but at both locations, I have WiFi & WiFi calling enabled.
Note, I have WiFi Assist turned off.
But either way, I was on a plane in airplane mode and the same thing happened 40% loss in a few hours with nothing but bluetooth listening to music I have downloaded.
I was camping all weekend in an area w/o WiFi and here's how that looks (Thursday - Saturday) you can see I used over 100% of my battery having to charge every few hours despite very little usage. that's what you'd expect to see in a zero wifi, bad service area:
My point is, I'm looking forward to 2.5 more hours of battery life. that would be awesome!