Samsung galaxy M21 battery drain issues

[Hasnanbd]

Dear one ui developer team

After oneui 3.0 update there are usual battery drain in M21. Specially at night when phone is unused it drains 10-15% which is very annoying. Please fix this problem as soon as possible. Thanks 

[vaish03]

same happening with M31..and thats so irritating

[Hasnanbd]

Samsung should fix this in next update 😑

[vaish03]

they say its 6000mAh battery..but it works like it is 4000mAh battery

[Hasnanbd]

It was great before the update.

[vaish03]

Did your phone still drains at night?
My phone still reduce upto 10% battery

[Ehsank]

one of the main reasons of battery drain is background activity,
even you close apps but they uses ur battery and running in background unnecessary, see image(1) and read the statement.
2nd due to huge notification options.
for e.g ; Google has huge notification which we don't need at all see image(2) just scroll up and down and check how many notification it does have.
So do these settings to stop, which consume battery unnecessarily.

1. Settings>>Connection>more connections settings> disable nearby device settings

2. Settings>>Location>improve accuracy >disable
A. Wifi scanning
B. Bluetooth scanning .

[Ehsank]

Besides above settings do some more settings to save more battery life and observe for next 1-2 days, it will give a noticeable difference

3. Device care>battery >power mode>select "optimised" and "adaptive power saving".

And then click on "app power management >
And enable these 2 options.
A. Adaptive battery
B. Put Unused Apps to Sleep.

FOR ANDROID 11;

A. DEVICE CARE > Battery>Background Uses Limit > Put Unused App to Sleep

B. Device care>click on 3dot at top right corner>automation>adaptive power saving

C. Device Care > Battery> More Battery Settings>Adaptive Battery

4. Long press on each app specially 3rd party(LIKE FACEBOOK, YOUTUBE) and rarely used apps and also ON "GOOGLE APP" as well, then click on>app info (ibutton> then go to these 3 options below on by one

A. Mobile data> allow background data usage>off

B. Battery >allow background activity >off

C. Notification >disable unnecessary notifications like promotional and unnecessary reminder notifications.

5. Go to settings> privacy > permission manager > location> and check which app have accessing your location all the time and if not using that apps then deny access or set as " allowed only while in use"
As unnecessary location access by 3rd party app causing battery drain.

6.  Go to settings > Google > on device sharing> check which 3rd party apps present there for e.g. if you use paytm , paytm will  shared data to show recommendation and suggestion which also cause battery drain

7.  Go to settings > account and backup> account > checkwhich app syncing automatically there and if any app which not necessary to auto sync then click on it and disable sync.

8. Go to settings >apps>search "weather" >click on settings icon right side > change "auto refresh" settings as per your requirements and disable some unnecessary reminder. ( due to auto refresh it continuously consuming battery)


9. If you use Facebook frequently then disable "auto play video"
And if you are mostly uses mobile, on wifi connection then also disable "auto play videos" in YouTube.

10. Settings>>Google >click on 3dot at right top corner>usage and diagnostics >off this option.

[vaish03]

i m using M31 and my phone drains 10%everynight and i did all the steps as you said above and it still drains

[Ehsank]

did you check which app consuming more battery in battery uses?, could you please share ss of battery uses