S21 Ultra battery drain

[YannJollien]

 Is this normal sot ? Feels like my battery is worse since A12 update and can't make it through whole day with one charge.

[BandOfBrothers]

I appreciate you must like your chess game but it is using quite a chunk of battery.

So is Google Chrome which I believe is a resource hog so personally I've disabled that and use Samsung Internet.

Have you considered clearing the phone's system cache files @YannJollien which might help.

Clear your System File Cache via the instructions in the Samsung Link. You may need to hook upto a computer or insert your headphones to get to the recovery menu. https://www.samsung.com/uk/support/mobile-devices/how-do-i-clear-the-cache-on-my-device/ 

Also looking at your screenshot your signal bars are pretty low which will mean the phone is working harder to maintain connection, and voLTE will be using more resources too.

Android 12 with Samsung One Ui 4 is a large update so it may take a short period of time for the phone to settle and apps optimise.

[GoanGeek]

Well your mobile reception isn't really the best it seems as bad reception will also have a toll on the battery.
6- 9 hours SOT is normal for S21 ultra depending on apps used.

[_Jonno]

It basically is normal regardless what apps I use I get about 6-7h depending on what I'm doing