yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy S21 Ultra] edward78:
First i used smart switch and phone got very hot ,battery drain too.

I did a hard reset and installed as a new phone ,only my photos/videos and settings were ported through smart switch.

Coming from note 20u(exyinos) and now on s21u ,i must say that s21u has a better battery life ,better screen(bright, no more weird screen retention marks), smoother refresh rate,no more overheating, better camera processing, overall a big improvement from note 20u
[Samsung Galaxy S21 Ultra] Nat.smith26:
Thanks but I've never done this kind of tweaks on my Note10+, never had to, so I really hope Samsung is gonna fix this issue.

About Smart Switch, the only thing I restored is the Messages database.

But tbh, since I've disabled 5G, this is really better, so I think the coverage is not good enough and the phone is constantly looking for the network.

LTE is okay, I'm on wifi most of the time.
[Samsung Galaxy S21 Ultra] rocku_dj2000:
Looks good so far..on my 2nd charge cycle..UK exynos variant
[Samsung Galaxy S21 Ultra] blackhawk:
Kies was always screwing up

Smart Switch can mess up real bad going between different devices. I've used it to restore the messages as well.

I now have a backup of the 10+ settings with it, apks and messages. Backups go well enough.

Next reload I test it out.

Since almost all critical is backup on the SD card I don't need to use Smart Switch but if it works out it's a win-win.
[Samsung Galaxy S21 Ultra] iFan66:
Delete the Smart Things app. It can eat up to 14% of your battery. Samsung will probably do a firmware update to correct it. I removed mine on Thursday and my device has been stellar. I received my device Tuesday and noticed how fast the battery drained then saw an video on YouTube identifying the Smart Things app as the culprit.
[Samsung Galaxy S21 Ultra] heartyparty:
First couple of days my battery was lucky to get 2 to 2.5 hrs sot before needing charged but after 4 days it looks like the usage ai algorithm is working better (as well as me tweaking some of the post management settings by turning moist of them off for apps that seemed to be part hungry initially) so I'm much happier with it.

Screenshot below...

Spoiler content hidden.
[Samsung Galaxy S21 Ultra] mtm1401:
Promising!

I'd disable chrome and use a different browser, the Samsung one is actually pretty decent and much lighter on battery, both in the background and when in use
[Samsung Galaxy S21 Ultra] mtm1401:
My only comment - Google YouTube Vanced ;)
[Samsung Galaxy S21 Ultra] rocku_dj2000:
Yes...i used it on p40pro earlier last year..but i am always concerned about how safe it is since its not exactly legal
[Samsung Galaxy S21 Ultra] mayaneire:
Day 3 here and:

Spoiler content hidden.
[Samsung Galaxy S21 Ultra] westeight:
First full day on Exynos with WQHD+, 5G and no power saving:

Spoiler content hidden.
[Samsung Galaxy S21 Ultra] mysterioustko:
Snapdragon version

FHD+ with adaptive turned on

Nothing turned off besides device scanning and wifi network notification.

4 hours of screen time and 8 hours of talk time (I talk a lot lol), and a little over 23 hours of battery. Coming from a Note 20 Ultra, I'm liking this battery life much better.
[Samsung Galaxy S21 Ultra] dscline:
I don't normally charge up to 100%, and never let it get down to 0, but after the first day I did charge it up to 100 and let it get down to 25%. Results don't look too bad to me for a new phone that hasn't yet started putting apps to sleep. This is a 256gb Snapdragon. View attachment 5204827
[Samsung Galaxy S21 Ultra] hellfire8888:
It all depends on how you '"benchmark" the battery life...from those screenshot above those application

áctive time is very low. If you total that up it is hardly 3 hours of real usage. To prove that your battery life is good you really need to use it actively. In the example below 2 hours of gaming playing pokemon which is not a CPU intensive game, 1 hour of youtube which is common for watching a short movie , 38 minutes of facebook pretty much bring the battery life from 100% to 40% .

View attachment 5204851View attachment 5204853
[Samsung Galaxy S21 Ultra] Outbreak444:
Had the same issue first day. Took a look and holey light was my culprit. Uninstalled it and battery life significantly improved.
[Samsung Galaxy S21 Ultra] mysterioustko:
Nobody is trying to "prove" they have good battery life, and nobody has to use their phone the way you say, for them to determine if they have good battery life. All they need to do is use their phone the way THEY use their phone, and decide if the battery life is good for their use. The example you gave means absolutely nothing to me, because I'll never play Pokemon Go on my phone, just as my use likely doesn't apply to many people since they probably won't have 8 hours of talk time. I say that to say, how about you let people use their phones the way they want to use them?
[Samsung Galaxy S21 Ultra] pro4ever:
2nd cycle on this phone and much better . Very happy exynos
[Samsung Galaxy S21 Ultra] mtm1401:
In flight mode? o_O
[Samsung Galaxy S21 Ultra] pro4ever:
Just normal usage. WiFi
[Samsung Galaxy S21 Ultra] mtm1401:
Have you done anything special with the set up? I'd like that much SOT in one day...

I did notice YouTube Vanced was making me drain at like 5% an hour just leaving a video paused, but even without that wouldn't get near..
[Samsung Galaxy S21 Ultra] bartjeh1991:
Whats the difference between youtube and YouTube vanced?
[Samsung Galaxy S21 Ultra] mzsquared:
No complaints here about battery life, it's weekend so not much happening, but I'm really pleased w/ battery on my Snapdragon 888. Saved some screenshots, that big drop happened yesterday when I ran some performance tests like Wild life stress test, Geekbench and others. Also, I don't use Power saving mode and what may have contributed to low batt usage is the fact that I uninstalled a lot of apps etc...
[Samsung Galaxy S21 Ultra] nightoooo:
Show only since last full charge, not the last 7 days...
[Samsung Galaxy S21 Ultra] mtm1401:
Ad free, it's on XDA somewhere
[Samsung Galaxy S21 Ultra] mankvl:
Vanced

The official website of Vanced - a Video client for Android (Not affiliated with Google/YouTube).

vancedapp.com
[Samsung Galaxy S21 Ultra] djoxie:
Ok but you charged the device several times, from these screenshots we cannot conclude anything about your sot. Do one cycle from 100 to eg 5% and show that
[Samsung Galaxy S21 Ultra] mzsquared:
My bad, am gonna update it after next, clean cycle. Those were all the USB -pc hookups.
[Samsung Galaxy S21 Ultra] westeight:
Seeing great battery on my Exynos. 5G (very strong signal), WQHD+, deep sleeping almost everything I don't use constantly.
[Samsung Galaxy S21 Ultra] Mini Jay:
I know what's wrong with your battery life. And you won't like my fix.

You're using 2 sim card. If you had just one sim card your s21 Ultra will have a much more battery life. How I know that ? Because I have 2 sim card and i work abroad now. At first my. Battery life was somewhere around 4h to 5h SOT. I was not complaining but just expecting more.

I disabled the sim card that I don't use in the country I work (so basically i cut off the network from the 2nd sim card).

Now my SOT is 7h at WQHD. And I'm using a VPN all day, and VPN constantly enabled is a battery hog. Meaning that SOT could be even greater. But 7h SOT is great enough per day unless you really have No Life 🤣

Anyway I don't use any battery saver I'm literally using the phone at it's factory default settings (except for the WQHD resolution at 120Hz).

Give it a shot

Equally if the 5g coverage isn't great in your area then disabled 5G it's useless. What drain the battery other than the display is usually the network, the signals etc. Because the more your signal is bad the more your phone will have to work in order to get that signal right. The more it works, the more it will consume battery. Simple as that
[Samsung Galaxy S21 Ultra] mtm1401:
Don't use a dual SIM anymore, but you can just limit one to 2g/3g usage, pretty sure you'll still get all the functionality without maintaining 2 lots of 4g/5g signals
[Samsung Galaxy S21 Ultra] UNIK97122:
i can't used less than 4G with my S21 Ultra exynos, i lost the network if i select less :cry:
[Samsung Galaxy S21 Ultra] Quazza:
God darn ....game changer ! Cheers !
[Samsung Galaxy S21 Ultra] erasure88:
Do you need root to install. Mine says "unavailable" after downloading the vanced manager
[Samsung Galaxy S21 Ultra] perikach:
hi all,

Samsung Cloud is drawing too much battery on the background from my Exynos S21 Ultra.

how can I disable it or remove it? I have already disabled all syncing and backup functions.

please help
[Samsung Galaxy S21 Ultra] lawtq:
No, you don't have to be rooted. Read the instructions properly.

You have to install version 15 of YouTube vanced first, then sign onto it, then install the version 16 update.

This is all assuming you've instalation microG first. Good luck
[Samsung Galaxy S21 Ultra] mankvl:
No just download manager, install vanced, and microG if you want to have notifications nad youtube view history.
[Samsung Galaxy S21 Ultra] Quazza:
Mines my kind of meh (Ex 512gig)

Spoiler content hidden.
[Samsung Galaxy S21 Ultra] amar9535:
S21 ultra (Exynos) battery is great. This is a big upgrade from note 20 ultra (Exynos), wouldnt even get half way through the day and about 4 hours of sot and would be touching 15 percent.

S21 ultra on the other hand though is a beast. Galaxy watch connected meaning bluetooth on 24/7, about 10 hours of mobile data rest on wifi, 120hz activated and power saving mode hasnt even been used yet.

View attachment 5218299
[Samsung Galaxy S21 Ultra] jorgine23:
The S21 Ultra is the greatest Samsung mobile I could have. Great performance but the battery is one of the strong points. Mines since the last charge

Spoiler content hidden.
[Samsung Galaxy S21 Ultra] TechSilver13:
My battery life has been much worse than my S20 Ultra. I have the S21 Ultra 512GB Snapdragon varient. I tested the background usage overnight and the phone hits deep sleep and looses 4% over 8 hours while I am sleeping so I don't think there is any rogue apps killing my battery (checking with better battery stats). When using the phone it gets warm and I drain like crazy. Right now my screen on time is 2 hours and I am at 63%. I don't play games on my phone, used a little YouTube, some wi-fi calling, texting and browsing the web with firefox/brave. Not sure what the issue is. My wife's S21 Ultra 128GB has way better battery life and our settings are identical (i went through everything last night). I am about to factory reset and start over.
[Samsung Galaxy S21 Ultra] Quazza:
Are we not meant to post screen shots ? Thread is filled with the them

Apologies
[Samsung Galaxy S21 Ultra] blackhawk:
Keep the phone warm when it's cold; Li's lose current capacity rapidly as the temp falls to freezing.
[Samsung Galaxy S21 Ultra] nightoooo:
This is exactly what happening to my S20 Ultra (Snapdragon), the temperature outside is about -4 and just to keep the phone outside my pocket is draining the battery much faster, it's too bad because sometimes i need to carry my PowerBank always with me when it's cold.
[Samsung Galaxy S21 Ultra] blackhawk:
I use my vest pocket. One time use pocket handwarmers work too. Don't overheat though.

Do not charge a cold Li. Bring it up to at least 70°F
[Samsung Galaxy S21 Ultra] whitehawk66:
I am by no means an obsessive compulsive phone user, but I use it with some consistency throughout the day. I typically remove or disable all the google and samsung crap I don't want or use right from the start. So far with my Ultra, I have about 70-80% battery left after a day of moderate use.... I really pushed it a couple of days and it got down to about 60%. I have it on the Highest Screen Quality setting with Adapt refresh. So far, I am extremely impressed with the battery life....
[Samsung Galaxy S21 Ultra] AeroSatan:
My experience
[Samsung Galaxy S21 Ultra] amar9535:
You don't need root, should just install through vanced manager. I have disabled the official YouTube app and deactivated auto updates for YouTube in the playstore.
[Samsung Galaxy S21 Ultra] Saggy:
View attachment 5219435

This my S21 Ultra Exynos version post Feb update..
[Samsung Galaxy S21 Ultra] Mini Jay:
I don't know for you guys but my battery life is insanely good. I wake up and unplug the phone at 5h35am. I use my phone a lot and that includes youtube Spotify twitter Instagram Facebook WeChat WhatsApp Samsung internet. I am lazy to make another screenshot but it's now 00:42 and i still have 12%.

For those who has battery life issue maybe consider contacting Samsung and check if your model has an issue or not because... That s21 Ultra rocks at every level

View attachment 5219481
[Samsung Galaxy S21 Ultra] duarterafael23:
i was getting 12hr battery life with 4hr SOT i have since gone to a U1 firmware with a Dec Build date and that seems to have done the trick, i use to lose 25% over night off charger no use. since the U1 install i only lose 3% over night off charger. the firmware i installed is DeBloated so non of the verizon junk. i will keep you guys posted how it continues. great info here so thank you to everyone for sharing
[Samsung Galaxy S21 Ultra] Jorinrou:
It's funny when people ask us to turn off this and that and disable many background apps just to keep the battery more lasting when we paid top dollars for it. Paying such amount of money and we still need to be worry about the apps running that will eat up too much of our batteries doesn't seems tally or right to me. In this era, the phone should be long lasting enough to empower the whole system in an optimal mode.
[Samsung Galaxy S21 Ultra] Jorinrou:
Mine is the exynos as well and my battery life is very sucks too :( it only can last half a day which is very disappointing
[Samsung Galaxy S21 Ultra] Jorinrou:
I have recently bought S21 ultra exynos version. It's been a week now and I feel the battery is draining very fast on me. I only have Instagram and WhatsApp for social media apps and just another 2 to 3 other non social media apps. Sadly, it can't last me half a day. Battery is dropping so fast. I on airplane mode when I sleep and it still has self heating issues because when I wake up in the morning I can feel the phone is quite warm. Battery dropped about 20% overnight even with airplane mode on. I did not have my location on nor sync email and I try to optimise some of the apps and always close some background app running (which I know some of you surely suggest about it). I even went to Device Care to put some apps to deep sleep as recommended by you guys but it's still doesn't aid my battery lasting issue. Previously I was using xiaomi 11 ultra and I decided to change the phone due to battery life as well. It dropped very quickly. I read up many of you praising about S21 ultra battery life hence I decided to switch. But it seems like its the same battery life as Mi 11 Ultra. I'm kind of regretted to switch because im paying much more for S21 ultra and playing games on mi 11 ultra is so much more better with excellent graphics compared to S21 ultra plus the charging speed on xiaomi 11 ultra is awesome. It only take 15 mins to charge to 90% so its not really an issue for me unless I go out without bringing charger. But Samsung takes much slower to charge even if its on super fast charging. I think it still takes an hour to charge to 90%. Its a huge disappointment on this overrated S21 Ultra that you all reviewed about. Can anyone suggest any tip or ways to help with my battery life? If I have to watch closely all the apps and to turn off this and that like what you all mentioned then it's really pretty useless and waste of money to pay such top dollars for all these hassles...
[Samsung Galaxy S21 Ultra] Mini Jay:
That is indeed a strange scenario. I have the s21 ultra snapdragon version and I haven't turned off anything, I'm using it out of the box and I'm running a VPN on top of everything. No issue with battery life.

You haven't noticed any apps that can be responsible of that battery drain? How about your network? Are you in an area where network is bad (hence forcing the phone to increase its signal to find 5G ?).
[Samsung Galaxy S21 Ultra] Jorinrou:
I'm not too sure about the network. But I'm mostly connecting to WiFi as I'm at home most of the time. I think my sim card only support 4G? Im not too sure. How do I check or anything I can provide you to help me?
[Samsung Galaxy S21 Ultra] Mini Jay:
About these 3 others apps. Do they use a lots of data (hence forcing the phone to constantly look for data in the scenario your network is weak).

In order to solve the problem, first is -obviously- to find the culprit. Unless you have a defect units, the origin is often to be found on apps or living in a location with bad network (since the phone need to connect to the network if the signal is weak, the phone will increase its signal to find it, hence increase battery consumption).

As to the apps, well to isolate the issue you can try uninstalling your apps (WhatsApp and IG aren't the culprit, I'm using those so..).

If even by uninstalling the other third party apps, your phone is still facing battery drain. Then the problem isn't within your apps.

The Hard way would be to factory reset your device, DO NOT restore anything, just use the factory settings. Wait and see if you are facing battery drain.

If you're still facing battery drain, well it's a network issue.

If your location has a good 5G cover then... You may have a defect unit.

Hope I could help and hope you'll find the solution to the problem
[Samsung Galaxy S21 Ultra] Mini Jay:
For the network I don't use any particular tool i just check on the network level. If I have like one or two bar, I know I'm in a location where the network signal is weak.

Since you're always on WiFi it means that your apps has no issue connecting to the internet to get the data (unless the server of the app is located in a place where connecting to the app is not smooth - in which case the phone will need more energy to get the data from the apps - hence ending up eating up the battery). But that scenario is rare. But if it's the case, the use of a VPN like me solve the problem (and VPN is supposed to consume battery but still battery life is still as good here)
[Samsung Galaxy S21 Ultra] lywyn:
If you have 5G on you will use more battery power as 5G is data only. The phone will also connect the 4G/3G radios for texts and calls thus using twice the power for keeping you online. If I turn on 5G I use 30% more battery in the day as the phone is trying to connect and manage 2 cell tower connections.
[Samsung Galaxy S21 Ultra] Mini Jay:
Somehow I also have the 5G turned on all the time and I am not facing the same issue as hers. However it also make sense if @Jorinrou is in a location with very bad 5G signal
[Samsung Galaxy S21 Ultra] blackhawk:
There's always plain Jane iPhone for the technically challenged🤣

Just because you have lots of bells and whistle features doesn't mean you need to or should use them.

Pick the ones you want and ignore the rest.

Many 3rd party apps like Poweramp and PD MDM to file in any gaps.

Point is you have almost unlimited options on a Samsung Adroid if you have the wherewithal to configure it properly. It is a art.

Not taking the time to learn the above will yield suboptimal results.

Welcome to the fking planet...
[Samsung Galaxy S21 Ultra] Jorinrou:
I'm in Singapore, advanced country. I don't have bad signals most of the times.
[Samsung Galaxy S21 Ultra] Mini Jay:
Have you tried to run the phone by uninstalling the third party apps ? The goal is only to know if the battery drain comes from either of the third party apps you've installed.

The thing is that if the phone is facing battery drain issue out of the box, my guess is that you have a defect unit. It definitely isn't normal to have your battery dying so quick
[Samsung Galaxy S21 Ultra] Limeybastard:
Try using 60hz.
[Samsung Galaxy S21 Ultra] Mini Jay:
13h SOT they may be exaggerating 😂

At best I can get up to 8h SOT and it's totally enough for me. If you get less than your Note so less than 4h.... Well I totally feel your frustration. I would say yeah go get it back but maybe find some kind of Samsung support to diagnose where the issue come from. There are many factors that can be the result of poor battery life.

PS : 120Hz is totally fine, you shouldn't be limiting the Ultra to 60Hz. Even by doing so, if it's the only way you get a good battery life, you still have a hidden issue draining your battery off
[Samsung Galaxy S21 Ultra] Jorinrou:
Sigh.. i dunno what to do. I'm not really a tech person but I have very little apps. I don't download many apps, social media I only have Instagram. I'm not sure if there's any settings that I need to set but the draining is quite fast it only last me half a day. My phone gets warm too by simple browsing or scrolling of Instagram just for a short while. It happened on mi 11 ultra hence I change to S21 ultra. Would rather use mi 11 ultra if I knew about all these. Since mi 11 ultra charge rapid within 10 mins which I don't get it from S21 Ultra even when super fast charging is on.
[Samsung Galaxy S21 Ultra] Mini Jay:
I advise you to contact the seller and ask for a replacement (or Samsung.. i don't know how it works when it comes to after sale service) Half a day is way too abnormal and the heating situation you're facing is also abnormal
[Samsung Galaxy S21 Ultra] Security555:
Unfortunately, Samsung out of the box is a trash can.

There is an option though to make a good phone out of it by removing all packages with the name Samsung in it (debloat)

I'm very pleased with the battery life of 2 days and 10 SOT (exynos).

In case you're not willing to debload a phone, Samsung isn't for you.
[Samsung Galaxy S21 Ultra] Mini Jay:
I'm using it out of the box without debloating anything (don't know how to do that, and I would buy another brand if I am not happy with Samsung software and apps).

And battery life is great so.. not sure that removing the Samsung apps would change a thing IMO
[Samsung Galaxy S21 Ultra] Security555:
After debloatig process my SOT went from a little above 4 to over 10 Hours.

Samsung trashware also run in the background all the time even if you never intentionally run it.

Furthermore after bebloating my RAM consumption went down from 9,3GB idle to 3.3GB.

@Jorinrou didn't ask you whether you like the phone or the software or not, also she/he didn't ask your opinion but she/he asked precisely for a practical help.
[Samsung Galaxy S21 Ultra] vlubosh:
will you post your debloat list? you have disbled or deleted those apps?
[Samsung Galaxy S21 Ultra] Mini Jay:
No offense but you advised her to debloat which is not something everyone know how to do. Plus if the Samsung apps drain battery like that why am I standing with a good battery life?

Now if debloating help to save some juice fine I hear you. But what she's facing is a s21 Ultra that doesn't last half a day. The problem is deeper so your debloating solution isn't really solving the issue. Unless what you are saying is that Samsung apps literally kills the battery but come on, that's not the case.

She doesn't need to debloat anything to get a good battery life. You like debloating or whatever, fine good for you, but that's not the case for everyone, and moreover that's not the solution to her problem.
[Samsung Galaxy S21 Ultra] albert0pia:
If you don't mind me asking, what case do you use with your phone? It might sound unrelated to the issue you are facing but you'd be surprised.
[Samsung Galaxy S21 Ultra] Limeybastard:
Not sure where you’re pulling up those numbers when you’re referring to my note or s21u. Please send links. Or perhaps you misquoted your response.

My S21u does around 5-6 hours SOT for 40% battery consumption at 60Hz. My Note 20 U did around the same maybe less.