Battery Drain issue

Thank you for reaching out to us.

We understand that you are experiencing battery drain after updating your Galaxy S25 Ultra with the December update. Some customers may notice changes in battery performance after a software update, and this can vary between devices.

To help improve battery performance, please try the following:

1. Make sure your device software is fully updated by going to Settings > Software update and installing any available updates.
2. Go to Settings > Battery and device care > Battery and enable Power saving mode.
3. Check Settings > Battery and device care > Battery > Background usage limits to limit apps running in the background.
4. Restart your device after a software update, which can help optimize system performance.

If the issue continues after trying these steps, we recommend visiting the nearest Samsung Authorized Service Center for further assistance:
https://www.samsung.com/ae/support/service-center/ 

Hi,
Try to wipe your cache partition by booting device into recovery mode and check. It should solve your problem.