Battery life is awful

Hi, when i buy the phone from seller the battery was ok, about 2monts. I reflash firmware not my country i dont remember which build number and baseband version i had. So i installed xeu region firmware. I used the firmware about 1week everything is ok, but now i see problems wjth battery life. Before factory resets multiple through the day battery dropped down 1-2 percent per hour dont using,just maybe i set up location to high accesary mode. wifi scanning is on when wifi is off, and a same tick bluetooth scanning is on. And set maybe power energy mode on or maybe not. I dont remember ,so per hour dropped batery just 1 percent. Very nicee. When i turn off power mode and turn off wifi when i go to sleep , battery from about 8 hours dont used just stand by battery dropped 1-2 percent down . Its good. I dont remember maybe the location function is on or maybe not :D... battery was ok. But now when i locked the phone i wiev how much battery left, before i go to sleep. So was 71, i put on battery saver, cpu, and turn on network and wifi mode is on while screen is locked to get messages from Facebook Mesenger,even i untick this setting,i dont have notification when i not open Messenger app. So i turned on . And i set the wifi sleep policy from always to never,which increase more battery life. So, after 12.a.m to 3.a.m from 70 battery percent just left 60%????????? How its possible, everything off , i dont see before like now... wben not battery saver is on from about 6 hours dont used the phone stand by wifi is off,location maybe is on or not i dont remember but doesnt matter. And i dont remember switch i wifi and blth scanning is always on when bluetooth and wifi when is off.... just dropped per 6hours 1 or 2 percent down.... im shocked.

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