Same to my s21ultra
s21+ user...same case here..
I guess u might try safe mode, if under safe mode ur battery still drain fast .. i guess is hardware issues. Better make appointment visit svc, they might check details for u.
Nah that's not logical cuz then the phone becomes 3ssentially unusable mah... How to get sot of more than 5 hours... And I just got my motherboard changed a month back ... It failed for no reason, luckily on warranty .... And it was fine B4 the update
Then i guess is the software issue 🥺
Try setting ur phone to dark theme, reduced background activity of apps, optimise your battery (under device care) and reduce performance to maybe high?
As I mentioned I already did all that... And it was fine in one ui 3... Dark mode dark wallpaper adaptive refresh and almost all apps are in deep sleep...
me too, i use accubattery apps to monitor
background usage is craaazy
ui 3 0.4-0.7%/Hour
ui 4 1-2%/Hour