Hi,
I tried to find this exact problem, but not. I have serious problems with battery on my unlocked european Galaxy S8.
First I just tried some basic stuff like clearing the cache, diagnostics of Google services and so on. Then I installed BBS and GSAM, but nothing serious here. I monitored it like three days very often. Only thing that havnt made me any sense, is Android OS (something to do with kernel). It had more drain, than screen.
Second I tried some apps that I was suspicious to. Google Fit, Chrome, Facebook,... Nothing.
Okay, I tried Safe mode and even factory reset and nothing. So I was that angry, that I paid that much money for something, that even doesnt work properly, that I ordered a repair (they came to my home, took my S8, rent me another one and than after week or so they returned it).
I finally thought that it was bad piece, because they found the issue and swap daughterboard, charging cirquits, battery and reflashed OS. I didnt used Smart Switch or Google restore. I manually installed all my apps and I think, that battery drain started after I launched preinstalled Chrome. So of course I immediately disabled it, but battery drain didnt stop.
Now I was on vacation on place, where is like one bar of 4G or no signal, nothing else. In that place, battery was dying very fast. I turned on airplane mode and guess...
With my usual drain that Iam trying to figure out, I have about 2-3 hours of SOT only checking mails and browsing web with Spotify. With airplane mode on I played movie at evening. I had 89% after 2h of continuous playing HD movie with airplane mode. After I disabled it, battery started dying fast again.
I could not figure out, what is causing this, because in GSAM, BBS and setting is only "Android OS" and nothing more suspicious. I tried to turn off WiFi and Bluetooth scanning even when they are off, but nothing.
There is all my apps that I have installed in my S8:
Google Drive, Duo, Photos, Play Movies and TV, MS Excel, OneDrive, Power Pint, Skype, Word, Samsung Email, Galaxy Apps, Internet, My files, Samsung Connect, Samsung Gear, Samsung Health, Smart Switch, Voice recorder, 4G switcher, Adblock Plus for Samsung Internet, Airbnb, Google Analytics, Android Auto, Apshalt 8, Bakalari (my school app), Boldbeast recorder PRO, Calculator, Calendar, Camera, Clash of CLans, Clock, COntacts, CPU-Z, CZC.cz (app for local IT eshop), eBay, ES File explorer Pro, Facebook, Flixbus, Flud, Gallery, Gmail, Golf Clash, Google, Google Trips, Hangouts, Google Home, IDOS (czech app for time tables of trains and buses), Instagram, IP Tools, Google Keep, Letuška.cz (app for buying airplane tickets), Google Maps, Mapy.cz (local maps app), Messages, Messenger, MX Player, My Vodafone, NaVlak (another app for timetables wih widget, thats always synchronized ony my screen), Phone, Play Games, Play Music, Play Store, QRbot, Samsung Members, SD Maid Pro, Settings, SledovaniTV (app for watching TV online), UniCredit Smart Banking, Speedtest, Spotify, Steam, Strava.cz (school app for ordering meals), Stream (local youtube), Tenda WiFi, Tik-App, Translate, Trello, Wifi Analyzer, Wifi File transfer Pro, YouTube, Zaslat.cz (local app for ordering couriers to deliver packages).
Could you guys pleas give me some advices? I even tried disable Always On display, but nothing. Iam very shattered about this. At least we know, that it is software related issue, not hardware.
Thank you very much guys and sorry for my bad english skills
EDIT: It is caused by SW 1000%, because I experienced same issue on rented S8 when mine was at warranty repair.
keboom said:
Now I was on vacation on place, where is like one bar of 4G or no signal, nothing else. In that place, battery was dying very fast. I turned on airplane mode and guess...
With my usual drain that Iam trying to figure out, I have about 2-3 hours of SOT only checking mails and browsing web with Spotify. With airplane mode on I played movie at evening. I had 89% after 2h of continuous playing HD movie with airplane mode. After I disabled it, battery started dying fast again.
Click to expand...
Click to collapse
you said it yourself..
it uses a lot more power when you have a weaker signal.
Hi, yes. It was worser, but I also had here my Nexus 6 and he was fine and chilling with one bar wo/ amy problems.
But with my S8, I have this problems in city wjere I live too. Amd there is everywhere full bars of coverage of 4G+ as my S8 says. Something is wrong. Usually at city I habe 2-3 hours SOT of light usage, on that vacation I could have maxfor example 1-1,5h. That was only worse.
I tried running 24 hours without any sync (I disabled it on status bar toolbox) and nothing change, so synchronizing isnt the cause aswell. It must be some app or bad settings or I dont know what else.
Thank you.
I get 6 hours of SOT and 1 day+ usage using an S8+ with AOD on, WiFi and more apps than you do.
Ask for a replacement / battery swap.
Please, there is milion threads about great battery life. I know that it have And as I said, they completely changed battery, charging cirquits and USB-C connector. And with airplane mode there is no battery drain. So I suppose, that it couldnt be HW related issue.
keboom said:
Please, there is milion threads about great battery life. I know that it have And as I said, they completely changed battery, charging cirquits and USB-C connector. And with airplane mode there is no battery drain. So I suppose, that it couldnt be HW related issue.
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Click to collapse
Try switching wallpaper and themes to black. The phone consumes less energy then
Minh225_ said:
Try switching wallpaper and themes to black. The phone consumes less energy then
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Click to collapse
Screen isnt that issue as I already told. And yes, Iam using dark theme and black wallpaper.
keboom said:
Screen isnt that issue as I already told. And yes, Iam using dark theme and black wallpaper.
Click to expand...
Click to collapse
Have u tried greenify app?
Minh225_ said:
Have u tried greenify app?
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Click to collapse
Why try Greenify... I need to know, what app or service or whatever is causing that issue.
keboom said:
Why try Greenify... I need to know, what app or service or whatever is causing that issue.
Click to expand...
Click to collapse
Greenify put unused and background apps to hibernate. I think it's worth a try. I used to have the same problem as u. After few days using Greenify, my batter is getting better.
I tried to Greenify suggested apps, but nothing. I tried AnTuTu Battery test (4% one) and Ive got 12800 points. I have problem with SOT, where percentage is dropping hard, but also sleep, there is big drain, but like 10% a night in well coveraged area. Could anyone help? I dont want to return this good device... But Iam also very angry, that I must deal with this sh*t...
Thank you.
Do a factory reset once more and try not to install ANY apps for at least 2-3 charges. Be in a good coverage area. After a couple of days, install your key apps and use it for another 2-3 charges. Finally install all your apps and check. As a side note, also check your standby time with and without data connectivity when you do not have any apps installed.
Install a app that watches for Wakelocks.
I suggest you this app: https://play.google.com/store/apps/details?id=com.asksven.betterbatterystats
I've used it many times and sometimes it can give useful information about something draining too much battery (While the screen is off).
Yes. I did this research. All I can see in those apps is drain by Android OS (no more accurate) and it stops with turning on airplane mode.
I tried Greenify almost every app to try, but nothing.
I dont have much time to do factory resets and setup my phone again and again. Iam trying to research it as deep as I can with yours help. If it will be neccesary, Ill do third factory res.
I will instal that monitoring app once again and then put screenshots in here.
No panic....something is bruning your battery and preventing your phone entering deep sleep....
Install betterbattery stats and post pics or wakelogs as mentioned before.....
Hint:i had similar issues back with s7... it was corrupted media file i had on sd card.... phone was trying to scan system and files in loop while connected to network.....any chance that you have sd memory external card with full of music? We will know more after your screenshots from bbs app.
Best of luck
Kernel wakelocks
Okay, I used it for while with permitted GSAm and these kernel wakelocks are very strange...
Grip sensor I dont know, but the umts is very interesting. It has to be something that is draining, because wo/ sim or airplane mode it is running perfectly fine. I read something about it and it is maybe caused because unsupported modem for my network, but I purchased it in here in official Samsung brand shop and yes, on the package is European SIM only. Which I have. My friend will try it and if he will have this problems, I will sent it to warranty again or my SIM card is maybe faulty.
Just install package disabler pro on play store. disable bloatware and applications that you dont need
Icant see any reason soing it. I want it sctock and running fine. These advices arent solution. There is problem in something else and I want to research what. There are mmc0 and umts wakelocks, but biggest wakelock is in some app that I could not figure out.
Does package disabler pro really help with the battery?
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