It is said that a Samsung phone learns users' habits and the battery life gets better after weeks.
Is that true?
I want to buy S21 FE (Snapdragon ver.) but the battery test results in Youtube videos are kinda concerning.
What's your Screen On Time after weeks of usage? Has it become better over time?

The only comaprison I can give is that it last at least 25% longer then Note 20 Ultra 5G with exynos and same battery capacity, FHD and 120hz. 888 is effective.

Initially I was concerned.. but after a week of light usage it easiely lasts 1 day with full charge.. SOT around 4-5hr.

Mine had 4h and 20 minutes since full charge. But I have about 50 apps in deep sleep mode. 5G disabled. And always on WiFi.

It seems today I have different results. I had a 100% charge yesterday morning. So, today at 10 AM I have 13 % left. During nighttime, it uses about 4% without turning on airplane mode.

I get between 5-6 hours on the Exynos variant.

It is said that a Samsung phone learns users' habits and the battery life gets better after weeks.
Is that true?

This seems to be true. When I first got my phone it was only giving me 3 hours of SOT. It's literally doubled now.

Randi03 said:

It seems today I have different results. I had a 100% charge yesterday morning. So, today at 10 AM I have 13 % left. During nighttime, it uses about 4% without turning on airplane mode.

View attachment 5565209

In my batery settings i don't see SOT. I have snap variant. Do you have to turn it on somewhere?

Click on the battery usage graph to view details by app and by time

DarrenTitor said:

It is said that a Samsung phone learns users' habits and the battery life gets better after weeks.
Is that true?
I want to buy S21 FE (Snapdragon ver.) but the battery test results in Youtube videos are kinda concerning.
What's your Screen On Time after weeks of usage? Has it become better over time?

You Got that right sister but can it be good for the positive use?

nktwister said:

Click on the battery usage graph to view details by app and by time

Thanks mate

008bond said:

I get between 5-6 hours on the Exynos variant.

Are u using 120Hz refresh rate?

This is with 60HZ. Update: nevermind. I just noticed I had the power saving feature on. I will have to repeat the test with it set to off )

Ok, final results with 60 Hz on and 52 deep sleeping apps. Phone has been running for about 32 hours straight. I did not use airplane mode and I was always set to wifi. I do not play video games. Just YouTube, Spotify, Instagram, and I often use the camera and browser.

omer7 said:

Are u using 120Hz refresh rate?

I am using bixby routines to switch between 120 and 60hz. Mainly the UI is 120hz and apps that don't cross 60fps like streaming services or some games are just set to 60hz.

008bond said:

I am using bixby routines to switch between 120 and 60hz. Mainly the UI is 120hz and apps that don't cross 60fps like streaming services or some games are just set to 60hz.

Edit: Okay thank you, I have found that option

How to use bixby routines to switch b/w 60 and 120Hz. I couldn't find any such option.

Can u plz share screenshot or tell the option?

Not a heavy user, but I'm quite happy with the battery life. This did include about 15 minutes using android auto connected, but that charged only a few percent.


Some extra info:
- mostly WiFi
- only used 4G when not on WiFi
- airplane mode during the night
- screen mostly set to 60Hz

Switched from note 10 plus to s21 fe for slightly smaller phone as s21 battery was much smaller..

Battery life is pretty good with wifi most of the time and many apps in deep sleep so it's not running in background .. my suggestion to others is to setup Bixby routines to switch to power saving at night or when battery is lower than 30% or so.. continually review apps draining battery or memory..

I get 5-6+ hours SOT.. need to test with navigation and lte use while on the road

omer7 said:

Edit: Okay thank you, I have found that option

How to use bixby routines to switch b/w 60 and 120Hz. I couldn't find any such option.

Can u plz share screenshot or tell the option?

You set your default refresh rate to 120Hz
Then you set up your application routine where you put in all the aps and set them to 60hz
With the exception of those you want to still run on 120Hz ofcourse

That is how i have it setup

I probably could get 9 hours, but I am using battery saving mode and limiting cpu usgae to 70%. It still is really fast. To preserve the battery I limit it to 85% and from 85% to 35% it last about 4.5 hours. Meanwhile I have GPS and Bluetooth on all the time. One pro tip if one wants still smooth experience with the 60Hz change the animation scale in the developer settings to 0.5.