yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy S21 Questions] davedes:
My S21 battery stats from yesterday. Running July apdate. Using galaxy max Hz with screen adaptive display set to 96/48Hz. Bixby routine set to turn off Bluetooth, mobile data and location services when connected to wifi.
[Samsung Galaxy S21 Questions] blackhawk:
Disable cloud apps.

Google backup Transport, Framework, Firebase and Google play Services are know serial offenders🤣
[Samsung Galaxy S21 Questions] davedes:
How do you download & update apps with most of your Google apps and services disabled?
[Samsung Galaxy S21 Questions] blackhawk:
Enable and reboot for Playstore.

For Gmail or Gmaps, just toogle on Google Play Services.

Otherwise it runs better without these apks.

I gave Google what it deserves... a big cup of STFU🤣
[Samsung Galaxy S21 Questions] obamaforever:
All that is diasbled, but still the drain. My Parental controll menu is even gone. I cannot see SOT anymore. How do I get that back?

Did I debloat to much maybe?
[Samsung Galaxy S21 Questions] blackhawk:
Android Turbo needs Google play Services to run I believe.

Accubattery gives better SOT history so that loss of functionality doesn't even concern me anymore.

I also use Galaxy Labs Battery Tracker.

Tracking down the responsible apks/services can be challenging. Clearing the app cache and seeing what pops up first can sometimes be helpful. A lot of junk is running under Android Services too, these can be difficult to ferret out.

All cloud apps will eat bandwidth and power with screen off.

Get rid of WhatsApp, FB, Instagram, Twitter, any shopping apps, etc. They are malware, battery hogs and security risks that don't need to run as apps. If the forum, site etc can't be accessed/used online through the browser, don't trust it. FB I'm looking at you🧐

No clue what load Parental Control puts on resources as I have no need for it.

Karma Firewall is a great freeware app that uses almost no battery. With Android 10 and above it's valuable logging feature isn't fully usable although it still will block. There may be a work around. I'm still running on Pie on a stock AT&T variant.

Its not one thing; I've use many different tools, methods and settings to optimize my 10+ over the last 1.5 years. It's ongoing.

Do not update the OS as it only changes the playing field making optimization much harder and generally provides little security improvement. Most malware is introduced by the user... there's no saving dumb bunnies🤭
[Samsung Galaxy S21 Questions] ems328i:
Great call on the Private DNS, thanks very much!
[Samsung Galaxy S21 Questions] blackhawk:
Thank you.

I discovered it by accident; no app needed.

dns.adguard.com

Works globally and is generally faster then my stock setting.

On browsers occasionally on some adware landen sites you need to play with a bit. A very few sites won't load... these are almost always trash sites anyway.

Been running it for about a month now.
[Samsung Galaxy S21 Questions] ems328i:
It's great! Usually I unlock and root my phones and have ads disabled that way but waiting for a more stable TWRP build for my new S21...
[Samsung Galaxy S21 Questions] blackhawk:
One other thing might be worth mentioning, dependencies.

Normally you just think on apks failing to work because of a other needed service being disabled. A disabled dependency could also trigger constant requests be made by daughter apk. It could be many per minute, eating up CPU cycles in the process.

Use what tools you have to find apks/services using abnormal amounts of memory and battery.

Best to not disable too many apps at once and some are better left running.

Many just sit there using liitle or no resources unless needed.

One of the reasons battery management tends to fail so miserably many times may in part be because of the above.

Developer options>standby apps; all buckets should show as active and not able to be manually set. Otherwise power management is active!
[Samsung Galaxy S21 Questions] obamaforever:
It is weird, I made reset of the phone in recovery in twrp and cleared the cache and it works great now. The phone has now according to AccuBattery about 10 hours SOT or over 100 hours sleep time. It is very good now and I dont know exactly why.

But also, I disable instead of uninstalled some apps and that could have made a ddifference...

Anyway thanks for help!
[Samsung Galaxy S21 Questions] blackhawk:
Excellent👍

Congratulations, many users never get to this point to realize the full potential of their Samsung. Its hit or miss it seems but just keep playing with until you get it done.

It is a world of difference, no?

Yeah... blindly disabling apks doesn't seem to work well.

Once optimized these are fast, clean running, rock solid stable devices.

Don't update it at all and it will run well for a long time.
[Samsung Galaxy S21 Questions] forever_lol:
Is there any good guide how to optimize apps/processes usage? I've gone through couple of youtube tutorials (where you're advised to switch off basically everything) but it hasn't made much difference. Standby drain over night is constantly 6-7%.
[Samsung Galaxy S21 Questions] blackhawk:
Read my many posts on this.

Use Galaxy labs battery tracker to try to spot it.

Google play Services disabled? Turn off when not needed.

Kill Google backup Transport, Framework and all cloud apks.
[Samsung Galaxy S21 Questions] davedes:
I'm getting decent battery life after the August update.
[Samsung Galaxy S21 Questions] Yoga999:
Seems like its getting better, 50% at 3 hours screen on time. S21 exynos
[Samsung Galaxy S21 Questions] blackhawk:
See that nose dive plunge? That kind of rapid discharge stresses the battery. That's not normal; find the app(s) responsible for it... take out the trash.
[Samsung Galaxy S21 Questions] kamajikaciya:
Hi, I'm a newcomer. I just bought my S21 1 week ago.

The last message of this thread has been written in Nov 2021. Thus I think battery problems has been solved.

But I'm facing a big battery issue. I cannot get more than 4-5 hours of SOT. Especially google play services consumes more than %7-8 battery per day. Idle battery drain is a big problem. I just made a clean install. Just transfered the apps. That's it. I wiped the cache many times. Installed BBS and Gsam. My wi-fi, BT and location is always on. I also disabled LTE. Dark mode, no adaptive battery, suspended cached apps from developer options and so on. Everything tried. No solution. My previous phones (Mate 10 pro and Mi9T) had never such issues. They have same battery capacity.

My friend bought a S21 FE with me and he does not face any battery issue yet. He can get approx 8-9 h of SOT with 1 and a half day of stand by.

Is there any consensus for this idle battery issues?
[Samsung Galaxy S21 Questions] blackhawk:
Try disabling Google play Services temporarily especially at night. Google backup Transport uses a lot of battery. Any cloud service tends to as well.
[Samsung Galaxy S21 Questions] syrinx75:
I think nobody found how to decrease the battery consumption of the S21.
[Samsung Galaxy S21 Questions] kamajikaciya:
Is that battery drain only occurs for S21? Not for plus or ultra or fe? Is this just a phone's issue or Samsung's UI issue?
[Samsung Galaxy S21 Questions] syrinx75:
I believe it's the same for all 3 models but it's more noticeable with the small battery of the S21.
[Samsung Galaxy S21 Questions] Endgame.:
So to chip in, i had my S21 for a year now and the battery is the thing that holds this phone back since the beginning.

I tried literally everything one can think of - and i truly mean everything.

The absolute most SoT i have ever gotten on MY device was 5 hours and 23 minutes - running it with a microG patched GSI.

On OneUI i dont even reach 4 hours of SoT, no matter what i debloat and degooglefy.

Its a shame, its a great "small" phone but the battery on Exynos chips is dumpstertrash.

Luckily i got it from Amazon and i can send this piece of overpriced crap back.
[Samsung Galaxy S21 Questions] kamajikaciya:
I'm not sure if the idle battery drain is the chip's issue. My friend's S21 FE gets 9-10 hours of SOT. There must be another problem.

By the way I can say that SOT rates depends on the usage. If you use your phone frequently within a day, you'll get more SOT. But this phone's main problem is idle battery drain. The comparison for SOT should be made with same usage statistics.
[Samsung Galaxy S21 Questions] blackhawk:
Access screen off usage is likely being caused by Google and Samsung cloud backup; one reason why you want a SD card. Using cloud storage instead is a sick joke.

Google play Services. 3rd party trash apps. Google Firebase is another one. Gmail is forever polling as well. Playstore eats more than it should.

My N10+ was a hot running hog before it was optimized. Now it's puny battery does as good or better than the S22U. Scoped storage is some of the culprit.
[Samsung Galaxy S21 Questions] kamajikaciya:
Here's my latest score:

Battery left: %20

SOT: 4h 49m

Stand by: 1d 3h

Wifi - On

BT - On

Cellular - On

GPS - On

AOD - Off

120 Hz

No Dark Mode

S21 - Exynos

Is it good (decent) or bad?
[Samsung Galaxy S21 Questions] emrrknn:
Hi Robin. It looks like it has been a long time since you've had this problem. Can you confirm that it has been resolved? Thanks in advance.
[Samsung Galaxy S21 Questions] RobinJ1995:
Nope... I've just resorted to always carrying a power bank around and running the "device optimisation" from the settings every time the device starts lagging to the point that the touch screen is barely useable (i.e. multiple times a day).

Needless to say, I'll never be buying a Samsung device again. Sending out Snapdragon review units but selling barely functional Exynos devices should get them sued imo.
[Samsung Galaxy S21 Questions] kamajikaciya:
I have some observation after 1 month:

1) Bad gsm signal kills battery very quickly. Moreover, using gsm internet consume too much battery than wi-fi. The difference is very distinct. I can ge 6-7 hours with wifi but 4-4,5 hours with 4,5g or 3g. In my country there's no 5G but I'm pretty sure every new G tech consumes more battery than the previous one.

2) If you're using whatsapp web and let it open in your browser, the app tries to synchronize any time. You can accept to use beta program to reduce for whatsapp web browser consumption.

3) Pokemon Go 's Adventure Sync is also a big juice consumer. Close it if it's not crucial for you.

My setup is:

Wifi - always on

Mobile - always on

Bluetooth - always on

Location - always on

Adaptive Display - on
[Samsung Galaxy S21 Questions] Organized:
I recently bought a S21 (Exynos) and I'm overall happy with it, but the battery life isn't too great.

I often use timers (when washing clothes, cooking, etc.) and discovered, that the stock Clock app (from Samsung) drains the battery when I'm using a timer. 4h of timer just running in the background lead to 8% battery usage. Do you guys also have this problem?

I'll try Google's clock now, but generally I want to stick to the stock app because of it's integration with Bixby.

EDIT: Okay, a reboot seems to have fixed the battery drain of the clock. Maybe there was just something weird going on.
[Samsung Galaxy S21 Questions] petiolarissean:
Its this simple people.Its new phone.In week or two kernel will settle down and give better consistsnt result.New hardware and software settles down after few dayz than kernel adapta to your behaviir aka actions you do.I flash alit roms and kernels.sean
[Samsung Galaxy S21 Questions] petiolarissean:
When purchased the phone I set it up and open every app.Then clear every app and let the phone sit for 24 hours or over night.That get kernel to settle down and as day go by battery life inprove
[Samsung Galaxy S21 Questions] blinkin:
Dude, it's probably my 10th Android phone. With every one I noticed slight improvement in the first week which is maybe max 30%. Now, the first 2 days with s21 I was getting 1.5h SOT and it was dead after 10h of sitting on the desk. No AI or aggressive kernel adjustments could fix that. There was something wrong with the restore process or Samsung's implementation. After reset (no restore) and maybe yesterday's update it seems much better. Still far away from what I was getting from p30 pro in the first week but I'm patient.
[Samsung Galaxy S21 Questions] dima613:
Coming from Huawei P30 pro, solid battery life from day one, no complaints even 2 years later, still strong and stronger than brand new Samsung's one

One week with Samsung, still bad battery life, I can see a very slight improvement, nothing special. Struggling to believe it takes so long to learn usage patterns and settle..

What is the difference between Samsung and Huawei, why Huawei is strong from the beginning?
[Samsung Galaxy S21 Questions] petiolarissean:
1.5 hours really.Im getting about 6-7 myself and use it alot.I have no updated just in case find exploit.Yea something wrong with phone and doesnt appesr to be dozing
[Samsung Galaxy S21 Questions] JCMate10:
These are my latest numbers.. 2.5 hours of SOT during 10 hours. Now down to 15% ... Running latest SW, with Feb 1 security updates... I have had the phone for 10 days. I have not seen any improvement.
[Samsung Galaxy S21 Questions] HugePotato:
Latest OTA caused very heavy battery drain for me like 50% during the night. Wiping cache and repairing apps from recovery menu fixed it for me and I encourage everyone to try it, won't delete any data unless you click "wipe phone" instead of "wipe cache"
[Samsung Galaxy S21 Questions] Soundchasr:
Wipe cache partition?
[Samsung Galaxy S21 Questions] JCMate10:
I just did a factory reset. I decided to set it up as a new phone. Then i made sure that all apps were up to date and that there where no new system updates. Then I restarted the phone and charged it to 100%. I disconnected it from the charger and that's it. After 1 hour 50 min I had a look at the battery stats. 91 % left, SOT: 1 min.
[Samsung Galaxy S21 Questions] HugePotato:
Yep
[Samsung Galaxy S21 Questions] JCMate10:
During the night, it went from around 35 % down to zero and was out of power this morning... no apps installed, running on a fresh OS, everything updated... Thats it. It will be going back and I will need to find a new brand of phone. Perhaps back to iPhone again after 4-5 years with Android... Just to reflect over the different ideas on how to extend battery life:

If you start to turn of all the smart features, Smart Things, WiFi, GPS, you really dont have a modern smart phone...

If you start to turn off 120 Hz display, animations, restrict processing speed, lowering screen resolution etc., you dont have a flagship phone...

And: If you need to clear cache, restart processes, remove system apps, etc. I dont think you are running a mature OS.

My girlfriend have an iPhone XR. During a day, the screen is on 4½ hour in average. It is charged every second day or so (1½-2 days). I am very disappointed.

Thank you all for all your input! I really appreciate this.
[Samsung Galaxy S21 Questions] blinkin:
Maybe we got some faulty units? I guess you won't waste time trying with replacement unit?

I mean all the reviews were very positive. Plus we'd probably see much more complaints on the internet...

I really love the smoothness and form factor of s21 so hope it can be fixed
[Samsung Galaxy S21 Questions] JCMate10:
I hope for the rest of the S21 owners that this was just a faulty unit. But it is a shame, I really like the rest of the phone. The screen is amazing, camera excellent and form factor fits me perfect. Will consider if I should purchase a temporary phone and see what the long term reviews says before I decide on anything.
[Samsung Galaxy S21 Questions] blinkin:
I might have found the issue. Try disabling the WiFi and Bluetooth location scanning. In my case the standby time seems to be greatly improved. I'll update in the evening.
[Samsung Galaxy S21 Questions] JCMate10:
Too late 😪 it's going back, an I am picking up a second hand iphone 6s 😀

I will wait a few month and see if things get better and then decide if I want to give S21 a second chance.
[Samsung Galaxy S21 Questions] AngelNine:
It helped me to reset my smartphone and download all apps manually, so WITHOUT Smart Switch or backup from Google.
[Samsung Galaxy S21 Questions] blinkin:
It helped me also a bit. What was the improvement in sot and standby?
[Samsung Galaxy S21 Questions] AngelNine:
Will test more tomorrow but it feels much better before I had 2-3h SOT time and standybe time 1 day, I guess now it's 6-8h SOT and 1x Day and 17h standybe or maybe more.
[Samsung Galaxy S21 Questions] blinkin:
In my case it's not that good for sure. I was at 2h SOT and maybe 10h, now 3-4h SOT and maybe 14h. How long did it take for the phone to settle?
[Samsung Galaxy S21 Questions] AngelNine:
Actually immediately, I immediately noticed how my S21 not Ultra or + lasted longer in standby, but as I said, I still have to test it overnight.
[Samsung Galaxy S21 Questions] fBx:
Last Ota update (AUB3) is faulty and causes tons of battery drain. German board I am on is full with complaints about that. I lost maybe 2 to 3 percent over night before that update. Now it's close to 30. It's definitely a software bug and I'm pretty sure it'll be fixed with the next update very soon.
[Samsung Galaxy S21 Questions] HugePotato:
Same here, complaints on Samsung forums and polish boards. Apparently Samsung knows and will fix it. We will see...
[Samsung Galaxy S21 Questions] HugePotato:
I think I found it... I disabled location scanning with wifi and bluetooth (mine had wifi only enabled) and battery drain seems to be no more. Try it for yourselves guys, I hope this finally helps
[Samsung Galaxy S21 Questions] fBx:
Unlikely. Mine were both disabled and I have the issues.
[Samsung Galaxy S21 Questions] skyline91:
Same here. 5g, aod and scanning are turned off. I debloated some things with adb, but battery is still crap. Next thing is to try factory reset since i restored backup of apps and pictures with samsung switch, but this switch from xiaomi to samsung "premium" wasn't good experience so far.
[Samsung Galaxy S21 Questions] AlexxxisRr:
Hi,

Thank you for sharing your experience with a battery issue. I've been thinking of buying this phone and right now I'm confused regarding its performance. I've heard that Qualcomm edition could provide a longer battery duration, however, it influences the price, of course.

Really dunno what to opt for in that case.

I like S21 design and camera seems to be great but the battery sucks.

I guess the old backup shouldn't affect the battery. Maybe it's better to get another brand.

Thanks.
[Samsung Galaxy S21 Questions] fBx:
I can't believe I have to spell this out, but as some people blame it on the brand or the device in general, I'll still do it:

It's

just

a

bug.

The battery life of the S21 is excellent. It surpasses the S20 any day and not only by a few hours. We're talking Exynos, of course.

This is a firmware related issue. It is a bug. That drain is not normal. It will be fixed in a few days tops.

If you want to switch to another brand because of a firmware bug, then be my guest. It'd sure be nice tho if you stopped laying out this drain issue as a general S21 problem, turning interested users away from it, because it isn't. My phone had excellent battery duration and standby times before the AUB3 update.
[Samsung Galaxy S21 Questions] joakimbo:
Got both disabled. Same battery drain. 30% overnight
[Samsung Galaxy S21 Questions] JCMate10:
Sorry to say, but i am sure you dont know for sure. Could be a crappy phone. Play it safe and return it if possible - thats my advise. No need to play testers for Samsung for free.
[Samsung Galaxy S21 Questions] fBx:
Unrelated. Everything worked perfectly fine before the February update.

Same answer to you. It just seems very unlikely that battery life was great for everyone and then all of a sudden, directly after an update, everyone has the same issues. People here are seeing things where there are none. It's a software issue, something went wrong with the update that is draining the battery now. It's just a matter of days until a fix rolls out.
[Samsung Galaxy S21 Questions] Gray44:
I was quite impressed with the battery life, until the February AUB3 update...

If I go to sleep with a full battery it will use 40% battery in idle at night, completely unacceptable!

(This is the LUX version, not German)
[Samsung Galaxy S21 Questions] fBx:
Doesn't matter which version. It's an AUB3 issue.

But just to be sure: #batterygate #samsunggate - there, I coined it
[Samsung Galaxy S21 Questions] JCMate10:
The issue is that not everyone had great battery life before. Read any forum.

If Samsung rolls out something that ruins everyone's battery life, then that is not acceptable, and would give rise to more noise that you see in this forum. So this is likely affecting a low number of users.

Again, I would (as I did before) recommend to send phone return and see how this evolves over the next few months. Otherwise, you risk ending up with a phone with 2-3 hours SOT until you spend yet another 8-900$ on a new phone. If you want to play testers, that's fine, but you can get a real job as such and actually earn a good salary ;)
[Samsung Galaxy S21 Questions] NolanBart:
I can confirm: with AUB3 firmware my s21 (8GB/256GB) discharges 30% overnight. Awful.
[Samsung Galaxy S21 Questions] fBx:
Have a look at my battery stats for the last week. Coincidentally, and I'm sure that's totally random, it goes waaaay up the same day the update rolled out. I wonder why that might be. Pretty sure the device is crap!
[Samsung Galaxy S21 Questions] HugePotato:
Yea sorry, it looked like I fixed it yesterday and it went to crap at night.
[Samsung Galaxy S21 Questions] FROGMaaster:
Same here. Before February update I got 3 days on first full charge. That was impressive. But after installing this crappy update I got battery drain. ~30% overnight with wi-fi and mobile data turned off. I hope Samsung will fix this asap.
[Samsung Galaxy S21 Questions] Kabforks:
Source?
[Samsung Galaxy S21 Questions] fBx:
There is none. It's just a completely reasonable assumption. Stop getting on my nerves.
[Samsung Galaxy S21 Questions] Pierre58000:
hello everyone what do you think of my results? I have the exynos version, the February update and I lose 5% at night

I have made settings where I strongly limit the work in the background, I have replaced facebook by facebook litle and messenger litle
[Samsung Galaxy S21 Questions] Kabforks:
Whoah, arent you a grumpy one? You come across pretty self confident that all the battery issues in this thread is attributed to the February update -- and the February update alone. Yet called out on your claims, you rely on your own assumptions.

If you don't have a credible source, but only assumptions, stop making claims that it will come out it a few days.

All we know is that Samsung is aware of the problem.
[Samsung Galaxy S21 Questions] blinkin:
Just my two cents - I had this problem before Feb update
[Samsung Galaxy S21 Questions] Kabforks:
Exactly. So we are discussing multiple things here.

It's likely that most of the recent post about battery issues, are caused by the February update.

However, users here should be able to discuss other battery problem that happened before the update or is happening in parallel with the update. A bad firmware doesn't mean previous problems are invalid.

I, for example, have identified multiple apps with many and long lasting wakelocks that caused battery drain, by monitoring the usage.
[Samsung Galaxy S21 Questions] luke_c94:
My battery has been pretty mediocre before the February update, but I've definitely noticed it's worse now after it. Phone will be going back in two weeks if it isn't fixed by then, already been messed around with the S20 FE 5G for 3 months with the display issues and promises of fixes that never came, won't be making that mistake again.
[Samsung Galaxy S21 Questions] joakimbo:
That's really good, but try going out with LTE on (not Wi-FI) and you'll see that you gonna lose 10% an hour in idle, after that update.
[Samsung Galaxy S21 Questions] joakimbo:
I head the touch screen issues just got fixed. Many reports on reddit showing no issues in test apps.