yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy S21 Ultra] MajorAly:
Oh man, it's been way too long since I visited forum xda that I forgot to check for replies. Apologies for that.

The results now I believe are improving, as my average SoT on my iPhone is anywhere between 3hrs-3.5hrs before plugging it in (although I plug it when it drops to 50%) and an average Screen off time of about 1hr.

The phone currently has learnt/analyzed the usage patterns so I expect it to provide a better time, also I'm going the route of battery calibration, currently it is sitting at 39%, going to let it drain completely and charge it (will be using 25W original Samsung travel adapter for super fast charging).

The only thing I changed from yesterday was that I enrolled in the Beta program for Google Play Services and uninstalled a few more apps that were not being used.
[Samsung Galaxy S21 Ultra] thanito:
I am on the same boat with the members above, the battery drops from 100% to 95% within 20mins of getting unplugged; reminds me of the glorious HTC days.. 🤣

Below are my latest stars, after reviewing which I am starting to believe that the battery capacity on my one month old phone is the culprit of my battery problems. I switched on my p40 pro two days ago and have it lying on the desk without sim cards but all apps are getting push notifications, updates etc (I even had to update 146 apps in playstore), yet the battery at the moment is 68%, OK I know that not having sim in the phone will significantly reduce battery drain, yet I am sure that the S21U without sim would die in 2 days with no use.
[Samsung Galaxy S21 Ultra] enigmaamit:
After the AUHD update, battery seems to have improved significantly, at least for me. I'm running everything on the phone, without any debloat or disabling any of the Samsung or Google functions and end the day with around 40-50% battery remaining almost every single day... Average SOT is now around 6 hours and standby time is 36 hours.

Spoiler content hidden.
[Samsung Galaxy S21 Ultra] P-KAY 2323:
Possibly. Yes.
[Samsung Galaxy S21 Ultra] Limeybastard:
Lol my battery health is 89% after one week from new 🤣 I ain't worried. As I haven't fully charged the phone to 100% yet.
[Samsung Galaxy S21 Ultra] lawtq:
Interesting 🤔

Not gonna try the beta?
[Samsung Galaxy S21 Ultra] enigmaamit:
Nope.

I'm very happy with the way the phone is right now. It's dialled to perfection as far as I'm concerned. After complaining and moaning for months, finally the software has been fine tuned to how it should be.

Going to a beta release of OneUI built on an Android version which itself is in beta, is bound to come with problems I'm not willing to deal with, especially given that OneUI 4 doesn't seem like a big upgrade as reported by members who have been brave enough to experiment.

I'm happy reading about the experience of the early adopters here. Will wait till next year before flashing stable A12, that too after 2-3 stable OneUI4 updates.
[Samsung Galaxy S21 Ultra] kenpaci:
Totaly true
[Samsung Galaxy S21 Ultra] Rogue8o8:
Buoy(paid app) extreme profile

96hz

2.5 hours of music playback

47 mins of heavy gaming

One ui 4.0 stable
[Samsung Galaxy S21 Ultra] StefanMagu:
Exynos? Btw what s the font style?
[Samsung Galaxy S21 Ultra] Rogue8o8:
Snapdragon US Model. I used to get 5 to 6 hours of SoT. The font is NuvoMono.
[Samsung Galaxy S21 Ultra] Rogue8o8:
Light usage and 4 hours of music streaming to my car.
[Samsung Galaxy S21 Ultra] WSPEOPLES:
To be honest my battery life is a little inconsistent sometimes it will last me all day of times it starts to heat up and my battery gets rinsed in a couple hours it's weird
[Samsung Galaxy S21 Ultra] Mobilelearner:
You can control screen power usage. This will give more battery life. You can check apps which usage more battery and control it.

Samsung mobile has good battery life. Snapdragon.
[Samsung Galaxy S21 Ultra] nightoo:
Now my Snapdragon S21 Ultra is giving me easily about 6 hours of SoT.

Sometimes it's giving me 8+ hours of SoT.
[Samsung Galaxy S21 Ultra] :
Mines exynos. Could easily get 8+ hours screen time.
[Samsung Galaxy S21 Ultra] Goku1992:
Sorry mate i forgot it :/ im tommorow at home so i can post it :)
[Samsung Galaxy S21 Ultra] Goku1992:
im tommorow at home so i can post it :)
[Samsung Galaxy S21 Ultra] Goku1992:
Tomorow im back home then i will post it! :)
[Samsung Galaxy S21 Ultra] rockky:
Battery Life (Snapdragon) sooooo much better post Update
[Samsung Galaxy S21 Ultra] :
I usually get amazing battery life but today it's crap. Battery consistency is Samsung's biggest downfall.
[Samsung Galaxy S21 Ultra] whitehawk66:
At first my battery life was superb but then i was ending with only 40-50% at the end of the evening. I'm not a terribly heavy user but I'm consistent.

I always uninstall the extraneous Google and Samsung apps I don't like or use.

So I did some more tweaking:

1) Uninstalled a couple more apps that seems problematic

2) Turned off always on display

3) *this is most critical* turn off background data of the google suite of services running as well as most of the Samsung stuff...*even if they had been designated as deep sleeping apps*

4) there is no reason for wifi, bluetooth or location always running.. i never have those on unless I'm using some that requires them... so I made no changes there

Also turn off the background data of your frequently used apps, particularly your browser .... there is no discernible affect on performance that I have seen now or in the past.

Now at the end of the day i have 60-70% battery left

Give it a go.
[Samsung Galaxy S21 Ultra] Khalid Madkour:
What do you have left xD - just kidding
[Samsung Galaxy S21 Ultra] Goku1992:
All the apps i use :D but you can reenable what you want or pick up the apps you want to disable :D
[Samsung Galaxy S21 Ultra] thegameksk:
Its terrible. I have wifi on, powersave mode on, airplane mode on, dark mode on, sync off, brightness 1 or 2 ticks above completely off and I get 6 hrs of SOT. If I turn off power save mode i'm lucky to get 3 hours. Plus Gsam and CPU is always telling me that I have high temps. 60 to 90 degrees.
[Samsung Galaxy S21 Ultra] Goku1992:
Seems like a faulty unit... How are your ambient temps?
[Samsung Galaxy S21 Ultra] thegameksk:
How would I find that?
[Samsung Galaxy S21 Ultra] R!n:
You take out a thermometer, hang it on the wall and take a look at it. They're talking about the temperature of your environment.

I got some good SoT recently. Only time I've been under 5h so far is when I was out in the mountains with some terrible reception.

Exynos, 4G and 60Hz because 120Hz gives me some weird shadows across the screen. I also noticed that 120Hz consumes much more standby because for some reason the AOD runs at 120Hz.
[Samsung Galaxy S21 Ultra] mtm1401:
Look at galaxy max hz for reducing AOD refresh rate
[Samsung Galaxy S21 Ultra] Goku1992:
This is my current battery life 50% mobile data (4g) 50% wlan. 24% left
[Samsung Galaxy S21 Ultra] :
The latest update ruined mine too. Was good on AUB9. 🙄
[Samsung Galaxy S21 Ultra] lawtq:
You need a fresh reset from scratch
[Samsung Galaxy S21 Ultra] thegameksk:
Its 60 degrees where I am currently yet Gsam says battery is 95 degrees and its running hot. According to the Samsung members app my battery is fine...
[Samsung Galaxy S21 Ultra] :
So after every update do a factory reset? I don't think so. That isn't normal.
[Samsung Galaxy S21 Ultra] lawtq:
Ok
[Samsung Galaxy S21 Ultra] Goku1992:
I only do wipe cache in recovery and everything is fine aftet an update....
[Samsung Galaxy S21 Ultra] cro-co:
%50 and over 5 hours.
[Samsung Galaxy S21 Ultra] moraal:
5 hours SoT in 22 hours. 18 minutes of Chrome and 42% battery. This seems odd....any ideas?

Spoiler content hidden.
[Samsung Galaxy S21 Ultra] Goku1992:
Chrome is bad... Use Samsung browser...
[Samsung Galaxy S21 Ultra] Gzoom82:
Am seeing 7hrs SOC, with 40hrs of total stand by time.
[Samsung Galaxy S21 Ultra] :
Mines crap lately. Blaming the new update as one before was perfect but can't downgrade as the latest version prevents you from going back to any previous software 🤬
[Samsung Galaxy S21 Ultra] Goku1992:
Chrome is bad... Use Samsung browaer

Iam seeing this every 2 to 3 days mate with sot over 9 hours :) and had about 22-24% left there :)
[Samsung Galaxy S21 Ultra] Berserker900:
3 Sot and 57% left is bad...?

I never get that man, i think it's great,no?

I guess this is the SD?
[Samsung Galaxy S21 Ultra] Quazza:
Big meh today
[Samsung Galaxy S21 Ultra] :
It's exynos. The AUB9 update I was on like 4-5 hour screen time at 50%.
[Samsung Galaxy S21 Ultra] :
Today battery Results 💩💩💩💩💩💩
[Samsung Galaxy S21 Ultra] da1e8:
I don't think the battery is all that bad exynos here too
[Samsung Galaxy S21 Ultra] rikardugama:
Its good this battery life with 30% left?
[Samsung Galaxy S21 Ultra] cro-co:
You could hit 9+ screen on time so yeah
[Samsung Galaxy S21 Ultra] ione2380:
This is after my first charge, brand new device, Exynos version. Qhd, 120hz and enhanced processing on all the time. 2% drain over night.
[Samsung Galaxy S21 Ultra] atcndw:
Already tried factory reset, but I think it should be better

S21U Exynos, AUB9 update 120hz QHD
[Samsung Galaxy S21 Ultra] atcndw:
Should I try to factory reset without using smart switch this time? I´ve tried to put 80-90% of the apps in deep sleep, but the battery doesn't get better

This last cycle, the smartwatch was connected for 8-9 hours
[Samsung Galaxy S21 Ultra] :
Report through Samsung members as an error report so they get logs from your phone. If everyone here does the same thing Samsung will have to send out a software update to fix.
[Samsung Galaxy S21 Ultra] :
Similar standby time to yours but no were near the same amount of screen time. Probably get another 1 hour until I'm at 51% if I'm lucky. It's drain 1% every like 3 min while using 🤬🤬🤬🤬🤬🤬
[Samsung Galaxy S21 Ultra] Kharn501:
Is there a consensus estimate of how much standby time translates vs SOT? Like for each 1h of SOT what's roughly the amount of idle time I would get?

Here's a shot of basically a full drain for me with battery saver & optimizer on @ 60 Hz. Location was also off pretty much the entire time and wifi was on for pretty much the entirety. I don't think I'd get close to 9H SOT some people are posting here but I'm not sure if this lifespan is supposed to be average or below avg between based on idle time vs SOT.
[Samsung Galaxy S21 Ultra] chalie78910:
Spoiler content hidden.
[Samsung Galaxy S21 Ultra] da1e8:
There's nothing wrong with your battery all your apps Facebook and Instagram etc are battery hogs
[Samsung Galaxy S21 Ultra] franagan75:
Ver happy with exynos version
[Samsung Galaxy S21 Ultra] chalie78910:
Instagram
[Samsung Galaxy S21 Ultra] obrad.a:
What do you do with 4h SOT ? You let your screen on, on the main screen without touching it ?

Your stats shows nothing with 4h SOT
[Samsung Galaxy S21 Ultra] Quazza:
So is the whole thing about apps coming across via Smart Switch causing battery drain real ? Tempted to factory reset to see if it improves battery but reeaallyyy don't want to if it's just a myth .....
[Samsung Galaxy S21 Ultra] Kharn501:
I don't know if it works and I was considering doing it but...

A few days ago I went in and disabled backround data usage for facebook/chrome and also went into developer options and for the hell of it set background processes to at most 4. I've attached the result which is no doubt the longest I've ever gotten out of 1 battery charge of any phone I ever owned. Almost 4 days with over 7h SOT is insane.

Since I'm WFH 99% of the usage here was browsing the web or chatting on messenger as you can see from app usage but I was able to almost get to 4 full days. I've attached a screenshot of basically the same usage profile before these changes and you can see the battery life was significantly worse. I'm not sure which one of the two above is more to thank but I literally did no changes except for those from a settings perspective. I'm still on AUB6 which is showing the latest firmware for me as a US SD888 user. The only other thing I could think of is an app update helping a lot but I really doubt that given I don't recall any release notes or a huge update for the main apps I use.

First screenshot is post changes, second one is from a few days ago before I did the above changes (I also posted it earlier in this thread but useful to have side by side)
[Samsung Galaxy S21 Ultra] Quazza:
Man that's incredible ! Can I ask how you actually do those processes ? (Disable back ground data for certain apps and set background process to 4 I mean - hell that bit I don't even know what it means haha)
[Samsung Galaxy S21 Ultra] denmastergaming:
Hi guys, I was wondering if I disabled allow background activity on an app, would I still receive notifications for them?
[Samsung Galaxy S21 Ultra] Kharn501:
You can disable background data usage for apps by going to settings>connections>data usage>wifi data usage. Then click on any app you don't want using background data and toggled "Allow background data usage" off. This particular setting isn't really what was saving me battery though because I reset the background process limit to default and battery drain increased noticeably again.

As far as the background process settings, you have to enable developer options to see it. You should be able to do that by going to settings>about>device and then tapping build number like 5-10 times IIRC. In developer options this setting should be towards the bottom called "Background process limit" and you can set a limit of up to 4. Do beware that every time you restart this phone this setting itself reverts back to default which is the standard background limit (see note below on that). It's also noteworthy to call out most people recommend against doing this but I personally saw no change in my phone's functionality by doing it.

I don't use a whole ton of apps so the impact may be different if you rotate through a ton of apps since I believe this setting will kill a lot of them from running in the background simultaneously. I might try running gsam with it off vs on and see what it is specifically changing but I'm pretty sure it's this setting because I restarted my phone the other day (which causes this setting to go back to default) and noticed a noticeable increase in drain again.

I'm by no means an Android expert when it comes to stuff under the hood but has anyone ever noticed this much of a difference using this setting in the past and is it to be expected?
[Samsung Galaxy S21 Ultra] Quazza:
Awesome,cheers. I do use a fair few apps but have just set it to 4. Let's see what happens from here!
[Samsung Galaxy S21 Ultra] aj7400:
Getting really average battery life
[Samsung Galaxy S21 Ultra] Khalid Madkour:
Full HD - 60fps

Exyones Version. April update

5g is disabled. 4g is being used. No wifi no NFC. Bluetooth is on and connected to active 2 + buds

Brightness was lower than 50% as it was night there.

Facebook and messenger uninstalled. I am using lite version. I am happy so far and I think this is the best I can get So far.

I will try with fhd 96 fps to see what will happen.
[Samsung Galaxy S21 Ultra] StefanMagu:
I bought a Galaxy S21 Ultra 4 days ago. It s the Exynos version and i am not quite satisfied with daily battery life.

The attachments below are from the past 2 days with the device being at 30% and 25%.

I used the screen resolution at FHD ,120hz,updated to the latest version and to april patch. I ve put the unused apps in Deep Sleeping Apps (Background usage limits),but still i didn t manage to get at least 6 hrs of SOT (screen on time), with 25%. (I didn t let the phone below 25 because it s not recommended to discharge the phones battery below that percentage).

What do you think guys? Should I return it back or just keep it as that is a normal behaviour?
[Samsung Galaxy S21 Ultra] MMarkkk:
exynos 120 Hz FHD+ (with disabled 5G modem)
[Samsung Galaxy S21 Ultra] walox:
I tried some of your advices but nothing works. Best result was today with 4:38 SOT. I am really disappointed, I decided to change me iphone 11 pro max because I read really good results about battery. With my iphone 11 pro max I got between 7 or 9 SOT depending which apps I used.

Now i am use the phone with 96hz, many apps with background data disabled, max 4 processes. Only remain is factory reset, I use smart swich with mi previous iPhone to transfer some stuffs.

Any other advices?
[Samsung Galaxy S21 Ultra] Goku1992:
Smart switch backup maybe broke something... My battery is Amazing good 8-12 hours sot with 2-3days off the Charger... But using 60hz. But with 120 or 96 you should make 1-2 days wizh a good 6-9 hours sot... Im also using mobile data often...
[Samsung Galaxy S21 Ultra] BaltazarIX:
Result after first charge ever, no tweaking, I'm trying to use location only if it's required. Telegram and Tidal are draining battery the most
[Samsung Galaxy S21 Ultra] BaltazarIX:
Second charge ever, this time I've disabled 5G because it's not supported yet in my area
[Samsung Galaxy S21 Ultra] SiNJiN76:
How do you come up with what is good and what is bad SOT?
[Samsung Galaxy S21 Ultra] Goku1992:
I would say with wlan over 1-2 days 10hours is good, 6 ist bad. With much mobile data over 1-2 days 7-8hours are good. Under 5 bad... This with full hd 60hz...with 120hz its 1,5-2,5hours less
[Samsung Galaxy S21 Ultra] ssj100:
Well it depends on a lot of things, and not just 60Hz or 120Hz - one significant aspect is if talking about longer periods like 1-2 days. If you have AOD set to "Show always", you will get a significant battery hit over a 20-40 hour period (especially since AOD doesn't get auto-disabled anymore when phone is face-down or in a pocket). You'll notice majority of people posting their SOT don't have AOD set to "Show always".

The other aspect is how you use your phone during the said period. The vast majority of people posting their SOT don't have a game or Maps navigation at the top of their battery use list - if they did, they wouldn't be getting anywhere near 10 hours. Spending hours on apps like one's browser, youtube, social media etc will use much less battery than gaming or navigating during those same hours.
[Samsung Galaxy S21 Ultra] Goku1992:
Thats right. I dont use always on, i dont game and barely using maps cause of gps in car :)
[Samsung Galaxy S21 Ultra] zoreli:
For excellent battery life use "ADB_AppControl_162" than disable apps you dont want to run in background.
[Samsung Galaxy S21 Ultra] walox:
Hi! What do yo have disabled? I want to try this, I almost dont use samsung apps or stuff like bixby, but I am a little scare of disabled some system apps
[Samsung Galaxy S21 Ultra] zoreli:
This is screen shoot fom my wifes S10+ (but its the same "+/-" like on my S21U /Exynos) ... mean its A11 with UI 3.1
[Samsung Galaxy S21 Ultra] walox:
Thank you so much! Will try and wait few days :)
[Samsung Galaxy S21 Ultra] matty100147:
So my girlfriend has the poco x3 pro and i have s21 ultra which have the same battery size, the majority of our apps are the same with the same basic weather widget, the poco x3 loses around 0.2% per hour while my s21 ultra loses 1.5% an hour, come the end of the day she has at least 30% more battery and we both have similar SOTs, its really quite amazing how bad Samsung are at battery life compared to other companies
[Samsung Galaxy S21 Ultra] georgi69:
Hi All.

It seems that SmartSwitch is pure evil that spoils battery life. I migrated my S10 to S21U and could not get past ca 3h SOT even after 1 week of using the device and many apps ending up in deep sleep in the meanwhile.

A friend advised that he had similar experience after doing SmartSwitch so I factory-reset the phone today and did the setup manually. Despite heavy use (reset as such and then full setup - all apps updates, installations, GBs of data copied, unpacked 12gb of whatsapp history, etc.) I have over 5h SOT until now with 23% battery still remaining.

Will report how it develops further but so far looks promising.

Exynos/256GB model, running dualsim (1x Physical + 1x eSIM, one of them always roaming) with bunch of corporate apps (no MDM tough, only MAM)

p.s. Sure, 5h is not that much compared to some of very good results above, but I consider this really heavy use from IO perspective and my setup with two sim is always special - one of them is always roaming and causes drain by constant search of home network. I also use 120hz at full resolution. Was one of reasons to buy ultra, not giving it up 😅.
[Samsung Galaxy S21 Ultra] BaltazarIX:
Third and fourth charge since I've got the phone. I had busy week so battery lasted me for almost 3 days with last charge, I could stretch it more but I wanted charged battery before sleep.
[Samsung Galaxy S21 Ultra] Zxspectrum27:
To get about 7 SOT, I need to put in sleep all the apps, no AOD, Standard motion, and FHD+ so, in other words, I need to resign from all the goodies I bought this phone for ........
[Samsung Galaxy S21 Ultra] mayaneire:
I have the phone since the day it started shipping. Used smart switch to transfer everything. Few days ago got "used for" 1d 15h and 12h 11m SOT. Its not a one off. Im not playing games or using maps a lot though.
[Samsung Galaxy S21 Ultra] zoreli:
AOD is on top of the list battery drainer , whats the point to buy S21 Ultra when you dont use alls "bells and whistles" ... 120hz , WQHD , AOD , Sync , Gps , great camera ... 12 Gb RAM , with plenty of apps . With all that battery is nothing but OK , in use 24 to 36 hours - with 5-6 SOT . Thats the truth ......... For me its OK , put my phone every night on slow chatging , wake up at 7AM and finish my "phone" day on/about midnight with 25-35% battery (3-3,5h SOT ) .... S21 Ultra is outstanding device but Samsung must push another big several updates to fix overheating and battery leak problems .

​

​
[Samsung Galaxy S21 Ultra] moodycharles037:
Can't complain, I get around 5 hours SOT a day with 30 to 40% left in the tank.
[Samsung Galaxy S21 Ultra] Veestaai:
Did anyone notice when the phone is in pocket and you are on the move, battery drains quickly. Can something be done to stop/minimize that?

My job requires me to move/walk through the day.
[Samsung Galaxy S21 Ultra] Veestaai:
I have the same settings but still stand-by drain is huge. This is at 23%. I have the exynos variant. Also, when does the doze kick-in with GMH?
[Samsung Galaxy S21 Ultra] mtm1401:
Search the forum for the 'Cameraservice_worker partial wakelock'. Also if you're on 5g that'll drain, as you need to maintain a 4g connection as well for calls and texts. Also if you're moving around a lot, it does drain more as you are switching between phone towers
[Samsung Galaxy S21 Ultra] shinsengloomy:
The May 2021 Security update definitely improved the battery over the April update. With this update, it brought back the battery life I got with the March update with at least 7 hours of SoT with my regular use from just 5 hours from the April update. Although it may have been less than a day since the update, I definitely noticed a lot of improvment especially on the standby
[Samsung Galaxy S21 Ultra] shinsengloomy:
I have a DBT S21 Ultra (Germany) got if via OTA. Quite a big file
[Samsung Galaxy S21 Ultra] iamnotkurtcobain:
I guess tomorrow or Thursday.
[Samsung Galaxy S21 Ultra] walox:
I will pray that this update improve battery. I still get only 4 or 5 SOT :(, Ive tried every advice that you have said
[Samsung Galaxy S21 Ultra] shinsengloomy:
haven't noted any issues with the update so far. It's only been a day since the update so I'll still have to see if there's anything that got worse after the update. I'll let you guys know.
[Samsung Galaxy S21 Ultra] babyboy3265:
Maybe poor network signal? Seems weird you should research it.
[Samsung Galaxy S21 Ultra] babyboy3265:
1st full day on AUDA.
[Samsung Galaxy S21 Ultra] walox:
I don't have the may update yet, but I understand you. I can't get more than 4 SOT, some days top 5 hours. But I can't finish my day with decent battery level. With my previous iPhone 11 pro max I always had 40% at least at the end of the day, same apps.

I had read very good comments about s21 ultra battery but I am very disappointed. I've tried every advice in this thread but nothing works :(