Android 12 battery drain problem

[Sdas21]

Don't know what is causing battery drain. Previously after Android 12 update CameraLightSensor was draining battery . Tried all troubleshoot ideas still the same. There's no sign off camera light sensor in the battery usage history. Even in casual usage (WhatsAp, YouTube,Fb, Browsing) phone heats. I don't use face unlock and Auto brightness. Always in dark mode and dark wallpaper. Charging with Samsung adaptor. 

Device - Samsung M21 2021 Edition 

[Anonymous]

Poor network strength is another reason for battery drain. Try stable wifi and check.

Reset the phone and reinstall the apps. This may clear compatibility/configuration issue. Avoid using modified apps.

[Sdas21]

Always on WiFi & already did reset and wipe cache partition

[Acknowledgeme]

Bro finally m21 2021 edition oneui5.0 released

[cs-member11]

Dear Samsung Member,

Greetings from Samsung Customer Support!

We acknowledge your query and apologize for the same. To resolve your device battery drain issue please visit this link: https://www.samsung.com/in/support/mobile-devices/how-can-i-optimise-and-extend-the-battery-life-on-...

In case the issue still occurs. Please register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report/Ask questions).

Thank you for writing to Samsung.

Warm Regards,
Samsung Customer Support