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Original topic:

S21 FE Standby Battery Drain

(Topic created on: 10-04-2022 02:49 PM)
Muhib
Apprentice
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Galaxy S21 Series
Hi guys jusy bought this s21 fe over s22 over a bigger battery 4500amp it is so bad. I hsd s7 edge which i used to get 6hrs screen on time. It drain hella mad with pretty much every app put to sleep. Im just a light user aswell its crazy. Over night i wake up with 15percent battery drain. My mum uses the a52 5g and that phone is so much bettery in battery health wise she had 3hrs screen on time with 70% battery left. While i would have 40% with 3hrs usage. 
10 REPLIES 10
Richmar83
Voyager
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Galaxy S21 Series
If it's a new or been reset then battery will be in a learning phase and should improve once this has completed.
I'd also look at clearing the device cache as this can assist.
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Muhib
Apprentice
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Galaxy S21 Series
Its been a week
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Muhib
Apprentice
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Galaxy S21 Series
It has gone past learning phase how do i clear cache?
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Yankag
Student
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Galaxy S21 Series

Hi did your battery improved? 

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Muhib
Apprentice
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Galaxy S21 Series
I used to lose 15% now i only lose 6%. I have done several things im not sure which reason has caused it to improve slightly. I reckon it is either down to latest april update or i clear data for device care and readded sleeping apps manually and updated device care which caused it to improve slightly. Im not sure. Seems like it used to do some heavy processing when not in use
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Muhib
Apprentice
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Galaxy S21 Series

I have gone back to draining battery over 15% overnight on idle for 6hrs. Its prettu ridiculous. Anyone has any solutions? I have booked repair to check it out

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Devashish1
First Poster
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Galaxy S21 Series

Got the S21 FE 2 days back and facing the same issue. Hardly getting 3.5 hours screen on time and battery is draining 15-17% overnight on standby.

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ctok7
First Poster
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Galaxy S21 Series

Hi, I am trying these configs below to try to maximize battery life (for just one day...). Hope this helps others:

- power saving ALWAYS ON (with limit apps and home screen disabled);

- extra dim ALWAYS ON;

- enhanced processing OFF;

- fast charging OFF;

- fingerprint always on OFF;

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Muhib
Apprentice
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Galaxy S21 Series
I have had a samsung movile technician out. The battery itself is intop shape. He was unable to figure out what is killing my battery. Something in background processing is causing issues. I lose 20% overnight. I have factory reset making no difference
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