yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy S8 Questions and Answers] BIacklisted:
720p power saving mode (who uses the whole offs core unless you're doing vr, or game emulating) it reduces core speeds by. 30% lasts me all day with heavy use 6hours screen on time with some streaming video playing games on the be tumblr etc
[Samsung Galaxy S8 Questions and Answers] prodigyX:
Try a full factory reset anyway
[Samsung Galaxy S8 Questions and Answers] akira888:
Or perhaps try resetting the app preferences first.
[Samsung Galaxy S8 Questions and Answers] nastypup:
I have my S7 and S8 next to each other at all times. I thought the S7 was bad but it's twice as good as the S8! I have a task killer set to every 10 minutes and it's still bad.
[Samsung Galaxy S8 Questions and Answers] akira888:
Hey guys. Just reporting back.

I have recently turned off AOD. And I got massive boost in my battery life. I am not too sure why AOD drained that much on my device, cuz seems some other folks still got awesome battery life with AOD on.

Also I connect to company's wifi when at work now. Cuz I usually only got one bar 4g network at work.

And here is the improvement. Battery life has been like this for 2 days now.

Hope this helps :laugh:
[Samsung Galaxy S8 Questions and Answers] icewolf293:
Been using my S8+ as i used to use my old phone if not more. the S8+ is just over 50% my old phone would have been around 15%. i like it
[Samsung Galaxy S8 Questions and Answers] prodigyX:
Setting up a task killer for every 10 minutes will make your battery life WORSE. Every time you open an app, the CPU has to go through all the processes from scratch and use more power to launch it. If the task was still in memory, it would launch without using nearly as many resources. Android memory management has gotten to a stage where it's so good that you should never have to kill any tasks.
[Samsung Galaxy S8 Questions and Answers] nastypup:
After last night's OTA update, my battery is much better.
[Samsung Galaxy S8 Questions and Answers] AdrianE46:
Which OTA is that? The red tint one? Or is there another one already?
[Samsung Galaxy S8 Questions and Answers] nastypup:
Yes. This is the 2nd OTA I have received since owning the phone.
[Samsung Galaxy S8 Questions and Answers] Sharpey76:
Im finding the S8 better than my old S7 Edge
[Samsung Galaxy S8 Questions and Answers] AdrianE46:
The second one I received was the red tint fix. It came out about a week ago. This must be the one you just received. I think. :)
[Samsung Galaxy S8 Questions and Answers] ac16313:
Seems counter intuitive to kill tasks every 10 minutes if battery life is what you're going for.
[Samsung Galaxy S8 Questions and Answers] unboxed:
I'm getting to the end of the day with 15-20% typically so no problem. After everyone freaking out about it I expected much worse.
[Samsung Galaxy S8 Questions and Answers] tuk1maar:
OLED-equipped phones last long on more than 30% brightness than it's rivals. If you require the best batterylife possible when using full brightness, your only options are the last-gen S7(edge) or the current-gen S8 (plus). If you always use your phone at a low brightness (30% or below) and you want the best batterylife, then get an LCD-equipped phone, any Sony or iPhone Plus-model would out-do the OLED-equipped smartphones by a longshot. It's simply due to how the technology works.
[Samsung Galaxy S8 Questions and Answers] Richy101:
More so if the OS is simply opening the killed apps up again.

I had poor battery life on my S8 and had used Smart Switch to transfer apps onto new phone. I was about to reset the phone when I read that someone had been a beta tester for Google Play Services. He uninstalled play services updates and then let it update to latest stable release and battery life improved. Did the same myself and dropped out of beta testing play services and just like that battery life picked up.

To put it in perspective last Friday my S8 ran out of power at 5pm after a light use day but at a site with variable signal. Following Monday after deleting the beta version I was at same site and at 5pm battery was at 65% with similar use.
[Samsung Galaxy S8 Questions and Answers] jimv1983:
People shouldn't be surprised at all by poor battery life on the Galaxy S8. It has a 2960x1440 resolution screen and only a 3,000mAh battery. Of course the battery life is going to suck. It would be like putting a 10 gallon gas tank on a big V8 truck and expecting 500 miles on a single tank.
[Samsung Galaxy S8 Questions and Answers] tehdef:
Get the **** out. You seriously are naive.
[Samsung Galaxy S8 Questions and Answers] Azizamiri796:
Im close to heavy user i check emails brightness in the middle mobile data is on talk 2 hours a day on the phone taking some pics and facebook and instagram and at 8pm still i have 20% left the best phone i ever had im not carrying any charger any more . but i dont know why u guys have this problem .
[Samsung Galaxy S8 Questions and Answers] Shuuin:
I don't think it sucks.

I have always on display on from 8 in morning till 22:00 everyday, rooted phone with custom kernel on so I can tweak here and there.

Used root for removing apps and other stuff I didn't need not use. And I get enough charge for two, almost three days.

I play some time killing games and I manage a Facebook group, reply mails and look on Pinterest almost every day. While I take pictures when I am out with friend and my horse.

Today I have been listening to music and doing all my work from phone and still have 52% left of battery and still have almost half a day left.

Screen resolution is in the middle, I don't need all that pixel. And my brightness is in the middle all the time too. I have mobile data on 24/7 I love free data ?

Still in love with this phone and I am still playing around with it ?
[Samsung Galaxy S8 Questions and Answers] Ray0414:
Battery life is awesome on my s8+. USA with snap dragon.

Installed black themes so all my settings use black backgrounds.

AOD is always on.

Auto brightness is off. (the sensors drain battery)

Put apps to sleep that aren't being used. They will drain your battery in the background. Search videos on YouTube.

Also turn off animations. Just search for the how to.

I had a new text message app that worked great, after 3 weeks it went rogue and was draining the battery big time. The app itself was using as much battery as the screen, which is insane. I Uninstaller the app and battery went back to normal.
[Samsung Galaxy S8 Questions and Answers] Blaalad12:
I work in a phone store and the other day some guy was saying to me that the S8 + battery life was awful so i immediately said "thats strange because i own the S8 and find the battery life to be very good except on maybe occasions where i use it outdoors alot and brightness is up full" I then asked him what his screen on time was and he said "all i can manage is 7 hours maybe 7 and a half" I was then like "jeez man thats not awful, thats decent if you ask me" ....... He looked puzzled and proceeded to say that his iphone 7 plus would easily manage 10 - 11 hours of screen on time and he was adamant the S8 + battery he had must be faulty and that he was gonna contact samsung to see would they take it back!

Is he crazy or am i for thinking 7hrs 30 mind screen on time was actually good lol Apparently thats awful haha
[Samsung Galaxy S8 Questions and Answers] callumbr1:
NFC on

Wi-Fi on

Auto brightness on

Location on

Sync on

AOD on

mobile data on
[Samsung Galaxy S8 Questions and Answers] JaeMelo:
Battery life here is amazing. Although there are many factors that play into battery drain, just out of curiosity; to the people with "battery problems" and 4+ hrs of "screen on time" do you have jobs?! I can barely make it to 2hours of SOT working 8am-4pm.
[Samsung Galaxy S8 Questions and Answers] irishwill44:
Galaxy s8 battery

I don't know what settings you have on but my battery lasts all day. It's a great battery in my experience with the S8.!!!!
[Samsung Galaxy S8 Questions and Answers] methoddon1:
I get 16h with 5+h sot... and i started having that only after I Uninstalled apps I wasn't using, disabled few Samsung apps and killed a battery into a shutdown then charged without turning the device On. AOD, Samsung Pay (NFC), Edge etc etc, all On...

no Location, No games... considering all facts of S8, I'd say it's holding up damn good.
[Samsung Galaxy S8 Questions and Answers] marcgear:
From my experience the battery life is slightly (and I mean slight) better than my s7 edge. I'm happy with this tbf
[Samsung Galaxy S8 Questions and Answers] tele_jas:
My S8 gets better battery life than my son's S6 and my old S7 Edge....But the Axon 7, I recently *upgraded from, got much better battery life.

Typically, by the end of a 9 hour work day, my Axon 7 had about 85-89% battery left.... My At&t S8 has 70-80% battery left. Some days, it seems to drain more than others (with less use), where as my Axon 7 was fairly consistent from day-to-day.

But, in saying all this... The S8 seems about on-par with my old Nexus 6P. It's not really that bad, but I find myself feeling anxious if I'm going somewhere and I don't take a charger and/or a battery pack with me.

I've started disabling stuff using one of those package disabler apps (from the playstore)...It seems a little better, we'll see after a few days and after I figure out what apps I need/don't need any more.
[Samsung Galaxy S8 Questions and Answers] jimv1983:
Naive? About what? Apparently you haven't used that many smartphones if you think a 3,000mAh battery is even close to being a decent size for a 2960x1440 resolution screen.

Since you are unaware I'll fill you in. The resolution of a screen has more of an impact on battery life than any other factor. The screen itself for having to refresh millions of pixels 60 times a second and the GPU for having to render millions of pixels 60 times a second.

Rendering and refreshing over 255 million pixels (2960x1440) every second takes a LOT more power than rendering and refreshing about 124 million pixels (1080p). A 3,000mAh battery isn't even great on a phone with a 1080p screen. Doubling the number of pixels and keeping the same size battery is absolutely going to have a huge impact on battery life.

The analogy I gave with the tiny gas tank on a gas guzzling truck is a perfect explanation.

For a more relevant example take the LG G2 and LG G3. They both had a 3,000mAh battery. a very similar CPUs(Snapdragon 800 vs Snapdragon 801) and they both had the same GPU (Adreno 330). They were practically the same phone except for one major difference. The G2 had a 1080p screen and the G3 had a QHD(1440p) screen. The G2 had ok battery life, not great but not awful. The battery life of the G3 was AWFUL.

I don't even need to use the Galaxy S8 to know that the battery life must be awful just like I wouldn't need to drive a V8 truck with a 10 gallon tank to know it won't get 500 miles between fill ups. What you call "naive" I call experience and common sense.

---------- Post added at 02:03 AM ---------- Previous post was at 01:59 AM ----------

If your S8 with a 2960x1440 screen and only a 3,000mAh battery gets better battery life than a S7 Edge with a 2560x1440 screen and a 3,600mAh battery then there was something seriously wrong with the S7 Edge. The S8 has 16% MORE pixels and 17% smaller battery.
[Samsung Galaxy S8 Questions and Answers] tehdef:
Are you trying to share your autism with people?

My S8+ with a 3500 mAH battery has yielded me about 35 hours and 7.5 hours SOT down to 8%. I'm sure I can stretch to 8 hours SOT across a day and a half.

Stop with your autistic babbling. Comparing a ****ing 800/801 on a 28nm die to a 835 on a 10nm IS ****ING LAUGHABLE.
[Samsung Galaxy S8 Questions and Answers] jimv1983:
So now using actual data to support a claim in "autistic"? First of all that's ridiculous and second that's disrespectful to people that actually do have autism.

For one thing I wasn't directly comparing the Snapdragon 800/801 to the the Snapdragon 835. I was comparing two phones that were almost identical (G2 vs G3) except for resolution to show that resolution has a MASSIVE impact on battery life. Bigger than anything else by a very large margin. And more important the improvement in battery life cause by a better CPU (the 800/801 vs the 835) is almost nothing when compared to the MASSIVE drop in battery life caused by double the pixels.

As for your claim of 7.5 hours SOT over 35 hours sorry but I'm calling bull**** on that. Not only are you claiming that the 835's power usage improvement is so much better than the 800/801 to give INSANELY better batter life but you are also making the same claim comparing to the 821(14nm die).

Take a phone like the Google Pixel XL which has a 3,450mAh battery, a Snapdragon 821 and a QHD screen. You are really trying to tell my that the Snapdragon 835 is so much better that a phone with a similar size battery and similar resolution somehow gets almost HALF the SOT and less than HALF the total time off charger? Now that IS ****ING LAUGHABLE.
[Samsung Galaxy S8 Questions and Answers] tehdef:
You weren't using data, you were using anecdotal evidence not even related to the product at hand. Those screens are OLD, and the tech is OLD, and the improvements that have been implemented over 3 years DONT EXIST.

https://www.youtube.com/watch?v=jBPcCETBGgI

There is a FHD vs QHD battery drain. As you'll find at the conclusion, a 2-3% difference over a 5 hour run down period of SOT. Improvements in the display tech have made this a near non-issue.

Furthermore, the fact that you cite a ton of "evidence" but don't even take the relevant time to review the threads on this forum for people posting outrageous battery life is suspect. A quick browse through R/GalaxyS8 finds me 8hours SOT at 32 hours, and another with 6.5 hours SOT at 56 hours.

So yeah, keep living your denial bubble. Good luck.
[Samsung Galaxy S8 Questions and Answers] jimv1983:
It doesn't matter that the G2 and G3 are old. Comparing two VERY similar phones with the only real difference being the resolution and having the higher resolution phone get DRASTICALLY lower battery life is PROOF that resolution has a HUGE impact in battery life. And the other phone I mentioned, the Pixel XL, isn't even that old. It's barely 6 months old and has specs not that much different than the S8. Sorry to tell you but the 835 isn't that much better than the 821. The battery life on the Pixel XL is GARBAGE but somehow the small improvement of the 835 over the 821 can DOUBLE SOT and total battery life.

Let that claim that you are making really sink in "somehow the small improvement of the 835 over the 821 can DOUBLE SOT and total battery life" ..... 821 vs 835...DOUBLE BATTERY LIFE

It even makes it more insane when you consider the Pixel XL has stock Android while the S8+ is infected with that TouchWiz garbage. Software doesn't make a HUGE difference compared to resolution but TouchWiz is certainly going to hurt battery life.

As for your YouTube video that isn't even a fair test. They are both S8+ using a different resolution setting...that means ALMOST nothing. The S8+, like all other modern display technologies, is a fixed pixel display. That means the number of pixels doesn't change so filling the screen of the S8+ is always going to require over 4 million pixels. As a result you still have the screen refreshing up to 255 million pixels a second when a true FHD+ display would only have to refresh up to 143 million pixels per second.

The FHD+ mode means that the GPU is only rendering a little over 2 million pixels but, as stated above, it's a fixed pixel display. That means the rendered pixels have to run through a scaler to upscale from FHD+ to QHD+ which takes a lot of power too.

Another point is that for an hour of that video ~70% of the screen was static content (the instagram part) and for another 50 minutes 100% was static content(the camera that didn't move). Since 2013 phones have had a technology called Panel Self Refresh (PSR). PSR works by buffering static content in DRAM and refreshing the panel from there. So for almost 50% of the test the GPU was doing a lot less work or, in the case of the camera, no work at all.

To do a fair comparison you would have to do a test with two phones that are otherwise identical (at least as much as possible) with the only major difference being a change in their NATIVE resolution. That is exactly why I choose the G2 and G3 because, despite them being old, they were very similar phones other than the NATIVE resolution.
[Samsung Galaxy S8 Questions and Answers] Majin101:
Bought a charging battery case. Solved my problem. ?
[Samsung Galaxy S8 Questions and Answers] tehdef:
Holy ****, please chill with the Autism. I ****ing linked an S8+ FHD vs S8+ QHD, and the difference at the end was 3%. Please stop. You look dumb.
[Samsung Galaxy S8 Questions and Answers] androFRUST:
Thank you both [MENTION=3731502]jimv1983[/MENTION] [MENTION=4621065]tehdef[/MENTION] for giving great insights! learnt much from your "banter".. much appreciated!

any thoughts on the difference between SD and Exynos? i have the Exynos variant. Just wondering whats the difference between the two chips in terms of power efficiency.. hope i did not miss an existing thread
[Samsung Galaxy S8 Questions and Answers] tele_jas:
I do have my resolution set to HD, not QHD.. That may make a difference? Or maybe Nougat has better battery management than MM did on my S7??
[Samsung Galaxy S8 Questions and Answers] methoddon1:
interesting discussion the two of you having here and I wouldn't go stand in your ways but I wouldn't want to stand by and not point out just one thing, - the "bullsh*t" part about 7.5h sot...

S6 Edge+ I was getting 19h with 8h sot easy (no games, no GPS, the rest was jamming heavy)

S7 Edge on Marshmallow I was getting 32h with 7.5h sot easy (same usage pattern)

S8 I'm getting 19h with 5.5h sot (same pattern but battery life is not consistent, can be less from time to time)

the point is, - when it comes to battery capacity in Android and Samsung I'm particular it varies who's hands the device is in and as for S8, I'd say it's holding up decent considering facts... and of course 10 nm processor helps in achieving that... huge and beautiful screen (as always) and as thin as it is, bigger battery wouldn't fit (Samsung didn't want to repeat Note 7 story)..

---------- Post added at 09:00 PM ---------- Previous post was at 08:58 PM ----------

p. s. by the way, - S7 Edge lost almost 2h sot after Nougat update.

every factor possible matters starting with Android, screen, capacity, nm of cpu etc etc etc.
[Samsung Galaxy S8 Questions and Answers] jimv1983:
Enough with the disrespectful autism comments. I'm not even sure what that has to do with this. As I said the S8+ FHD vs S8+ QHD is a meaningless test. Both tests have the screen refreshing the same number of pixels and a large part of the power saved by rendering less pixels is shifted to running the scaler. In that case of course it's not going to show a huge difference. For the test to be meaningful the S8+ FHD would have to be running a NATIVE FHD. It isn't!

I don't know much about Exynos chips so I can't really comment.

As I said to tehdef phones use fixed pixel displays which means the display is always showing QHD. Setting resolution to HD just means the CPU is rendering few pixels but to get up to the QHD native resolution upscaling is occurring. Nougat does have better battery management but no by a significant amount.
[Samsung Galaxy S8 Questions and Answers] strongylad28:
Kind of don't want to get involved in this thread because of all the arguing, but my battery life is concerning me that much that I have to ask someones advice. I have the standard sized S8 in the UK (So Exynos I believe?) Settings are as follows

FHD (not QHD)

50% ish brightness (non auto)

GPS off

Wifi Off

NFC on

AOD on

BT off

Edge on

I am currently at 48% battery with SOT of 1h 22m. Am I right in thinking that seems pretty low? Some days I get through the full day which is cool by me, but at the same time when I see people getting 4+ hours (I know the 7-8hr claims aren't realistic day to day) it makes me wonder because by my calculations my battery should be dead around 2hr 40 m SOT at this rate (which seems a bit crap)
[Samsung Galaxy S8 Questions and Answers] dragon57:
That does seem low. If you are in a location with low signal, that can cause battery drain. Something to keep in mind from day to day.
[Samsung Galaxy S8 Questions and Answers] strongylad28:
I'm in pretty much full 4G all day. I thought maybe signal but I don't think so :confused:
[Samsung Galaxy S8 Questions and Answers] dragon57:
No, that doesn't sound like the issue. What is strange is I am running with gps, WiFi, and bt all on, and I get great battery life. My only difference is I have nfc turned off.
[Samsung Galaxy S8 Questions and Answers] strongylad28:
How strange! I'll download a battery monitor and see how the wake locks are going etc. When I really use the phone (day off for example) the speed in which it discharges is crazy!
[Samsung Galaxy S8 Questions and Answers] Dreadish:
S8 normal exynos version here

FHD (not QHD)

30% brightness (non auto)

GPS off

Wifi Off

NFC off

AOD off

BT off

Edge off

18 hours on, mostly watching movies on 45% brightness got 3 hours SOT with 66% battery left. Ide say from my experience if you watch 50% of the time movies, and 50% of the time browsing WIFI - this will get you with 7 hours SOT easly.

Take that other half gaming u get 5.30 hours SOT, take other half LTE surfing, 6 hours or so.

Using web browsing with LTE from 100% too 0 % gets you around 5.30 SOT, if ou have perfect LTE signal, u get 6 hours or so.

All thoes settings using brightnes around 50% give or take 10%.

Thats my experience on s8 last two months. All based on facts (disabling apps, didnt do much effect on batterylife imo):D

And lastly - S8 batterylife does not suck - considering tall display, using normal tweaks u get in mixed you withing 24 hours between 5 and 6 hours of SOT.

Thats my assesment from my experience.
[Samsung Galaxy S8 Questions and Answers] tbob18:
My battery life has been pretty good.

Pretty much in line with my old (now bootlooping) G4. Around 2-5h SOT over 20-30h depending on signal strength and how much I'm on wifi, how much I use the camera, etc. I don't really have any apps syncing in the background and don't use many social apps.
[Samsung Galaxy S8 Questions and Answers] tbob18:
Debloating with BK Package Disabler helped a bit I think, another advantage is disabling bixby entirely. I can't count the number of times I hit that button accidentally and I've only had the phone for a week.
[Samsung Galaxy S8 Questions and Answers] ticalo:
My phones battery sucks big time.
[Samsung Galaxy S8 Questions and Answers] dieselhazza:
I have an XZ Premium and the battery life is much better than what most have posted or said about the phone here.
[Samsung Galaxy S8 Questions and Answers] Sean Carr:
I've had a SM-G955FD with the Exynos Chip for a few days now. I've already decided to swap it out for a SM-G9550 with a Snapdragon Chip hoping I'll see an improvement in battery life. I've been tweaking a number of settings, deleting and disabling apps and experimenting. Haven't seen much improvement and no where near the life of S7 Edge I traded up from. Not only is battery life poor, it has charging deficiencies as well. I haven't been able to fast charge with either direct connection or wirekess. It takes all night on the wireless pad and still isn't up to 100% after 8 hours. I had an online chat with a Samsung Tech. Not surprising he didn't offer any solutions, stated it's a defective phone. The Samsung Community Blog has page after page of users having battery and charging issues. I'll provide an update after I've spent some time with the Snapdragon chip.
[Samsung Galaxy S8 Questions and Answers] androFRUST:
i wonder whats going through Samsung's QC department! First the red displays, now the battery! Starting to lose hope on this company. My previous Mate 9 was awesome with no defects.. surprises!