S21 battery

[Tk_s21]

I've noticed my s21 battery drains quite quickly 3 months after buying it can someone help me and give tips??

 Also I'm not even doing heavy usage mainly just using social media

[lminvti]

Hi @Tk_s21 and welcome 👋

It could be due to phones age, as s21 was released in 2021, typically you will see dramatic changes in battery performance after years of usage as battery degrades over time. Now you can try few things:

Wipe cache partition:
Turn off your phone,plug into PC,tv etc via USB Then press and hold power button and volume up button until samsung logo appears Then quickly release power button and keep holding volume up button until reboot menu appears then navigate with volume down button till wipe cache partition press power button Restart your phone.

Check apps who uses most of the battery try uninstall and reinstall them.

You can also try Batterystas reset. Open your phones dialer type *#9900# scroll down till you see batterystats reset press on it. (Autoblecker in settings needs to be turned off)

See if any of that helps

[BandOfBrothers]

This could be an app you've downloaded @Tk_s21 

Try Safe Mode  > https://www.samsung.com/uk/support/mobile-devices/how-to-start-my-galaxy-device-in-safe-mode/ turns off downloaded apps and themes etc which may highlight an app or theme that's causing conflict. Alternatively long press the power off button and then long hold on Turn Off to get to Safe Mode. 

As a last resort back up and factory reset is an option if the steps highlighted by @lminvti  👍 do not resolve this. 

If i can be of any further help please don't hesitate to ask  😎 

[Ocean_Waves_S21plus]

@Tk_s21
Oh!! Have you/prev. owner replaced your battery since purchase. Sometimes, it overheats and drains faster when it needs replacing!*

Look into your device care and members diagnostics for a bit of help as well

*rough 20 pounds for fitting and purchase for a new battery

[Martin212]

My S21 battery went from lasting more than 2 full days to less than 20 hours with almost no use after the January 2025 update. Anyway to roll back to previous update?