Battery Life Problem Solved
|Asus Zen Phone 2|
I'll cut to the chase - REMOVE YOUR MEMORY CARD. This is the second time this has stung me. My old Samsung S4 suffered the same problem. Took me forever to figure this out - factory resetting phone, stop using popular apps like Instagram and nothing. Took my expanded memory chip out and boom! Battery sucking problem solved.
I now understand why Apple iPhone has never had the expanded memory option on their phones. By no way am I converting from Android to IOS, but I at least I get it.
So maybe a compromise - just keep a memory chip handy if you run out of room. Migrate all your photos/videos to the memory card and then dump it to your computer.