need a week to adapt the new update, just wait and use it a week [ normally ] then check. or:
try this tips:
1. turn off mobile data network when it's not necessary/ when signal is poor [ don't use many apps which requires data network ]
2. go to security -> manage apps -> permissions -> Autostart -> deny all
3. go to security -> manage apps -> permissions -> other permissions -> permissions -> start in background -> restrict all
4. go to security -> battery -> tap setting icon on top right corner:
*turn off mobile data when device is locked -> set to in 5 minutes
*clear cache when device is locked -> set to in 1 minute
5. enable battery saver.
hope it's can increase your battery backup. Regards ✌️