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S7 Battery Drain With Oreo Update


    Hello.  Recently updated my S7 to Oreo and am experiencing severe battery drain.  A full charge only lasts about 5 hours, which is a significant decrease since the upgrade.  I've seen a few threads online where suggesting this is a bug with Oreo, but have not found a solution.  Thoughts or suggestions to fix this?  Thank you!

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      • smplyunprdctble

        Here's my experience with ANY battery drain:


        • If it is happening immediately after an OS update, it's probably one of your apps not happy with something.  The first thing is to make sure all your apps are up to date.  If that doesn't work, try factory resetting (FR).  There's something weird that happens with apps and some think they're still on an old OS version and it causes battery problems.  Sometimes clearing the cache/data on the apps works, but doing it one at a time is a huge trial and error when you don't always know what's eating your battery, so a FR is generally more efficient.  If a FR and reinstall of all your apps doesn't work, do a FR and install a couple apps a day until you find the problem app.  Then, you'll have to contact the app developer to see if they realize there's an issue.
        • If it is happening and nothing's changed (to your knowledge), check your accounts.  I recently had battery drain going on a couple weeks on my device.  I initially attributed it to being in a conference room from sun up to sun down and not having immediate access to my charging cable.  During something unrelated, I learned my Subsonic setup at home had lost my account.  That meant my phone kept trying to log in and was failing.  Nothing was notifying me of such.
        • Check signal strength.  This generally is a consistent drain even with new devices.  When I'm home, I have great battery life, but when I would visit family in MA, I had horrible battery life in one area of town.  The signal "seemed fine", but it was just on the weak side that area of town because of the mountain.  Usually connecting to WiFi resolves this (it did with my mother).
        • And, I know this still has to be said -- but, please don't use a task killer app.  Android really hates them.  You kill an app, and Android brings it back, you're just using extra cycles that the battery could be using.  This is especially worse when you're using an auto task killer app.
        1 of 1 people found this helpful
        • iiiper

          2. Re: S7 Battery Drain With Oreo Update

          After update last night I factory reset and still have the same issues.

          Even location & maps will reboot the phone.


          My cell has been unplugged since 10am and is now 12:34p. Battery is 62%.

          Prior to oreo it would be 88-91%.

          Today I have barely touched my phone compared to normal.


          It's obvious T-Mobile did not truly test this update.


          It was pushed too soon. Last resort is to factory the phone 3 times and do not restore anything. Not even your email.


          If it continues to happen it's officially in the update.


          Which it is for most of us.

          • tmo_lauren

            3. Re: S7 Battery Drain With Oreo Update


            This isn't a common issue we are seeing across devices, fortunately, although that doesn't make it something we don't need to address with you. Have you ensured all apps are updated? We do see resource competition and optimization issues in some cases where existing apps don't play nice with an update.


            If that doesn't work, we may just need to look at exchanging the device if covered.



            • anatara43

              4. Re: S7 Battery Drain With Oreo Update

              I'm having the same issue. Ever since the update my battery is dying super quickly. I went from 100% to 52% in 2 hours and that's only with using twitter and facebook (for about maybe a total of 20 mins together within those 2 hours - no other apps running). I also don't like the changes that have been made. The new app fonts are so tiny and hard to read plus this new right swipe to open the apps page is very annoying. I've had nothing but issues with this new update.

              • c.a.chopp.ii

                5. Re: S7 Battery Drain With Oreo Update

                This is actually a fairly common problem that is showing up on a variety of

                the Samsung S7 series phones.  Just do a Google Search on for it and you'll

                find numerous postings all showing extremely rapid battery discharge rates

                immediately after T-Mobile pushed out the Android Oreo update onto those



                In my case, no other apps have been installed or removed, and nothing was

                changed on my part when this update was allowed to install itself.  The

                Google Play Store app is allowed to automatically perform app updates as

                they become available, and there were several that did get updated after

                the Oreo update was on my phone, so I'm assuming that if there were new

                versions of apps ready to install if/when Oreo was present, then they've

                been installed.


                There is sluggish performance when doing any of the following:  turning on

                the display, starting new apps, switching between apps and any time that

                the virtual keyboard has to be displayed or hidden.


                There is extremely rapid battery discharge going on.  I was seeing my

                battery go from 100% charge to 10% charge in less than 3 hours, and that's

                doing almost nothing with the phone.  Normally, with minimal use, I see my

                charge drop from 100% to perhaps 77% over the course of 6.5 to 7 hours, and

                a mere 35 minutes on the fast charger brings it back to 100% again before I

                leave work at the end of the day.


                I did go thru the process of shutting off my phone, then holding down the

                volume-up, home and power buttons all at the same time until the recovery

                boot menu appeared on screen, after which I had it clear the cache

                partition and reboot.  After that was done, I'm still observing all the

                same sluggish performance, but the battery discharge rate is not as bad as

                it initially was after the update.  However, battery life is still not as

                good as it was before the update.  Right now, it's been 6 hours since I

                took it off the charger at 100% and left for work, and it's down to 71%

                charge.  It shouldn't have gone below 77% to 78% for another 1 hour and 45



                I really don't care if it's T-Mobile's problem with all the bloated crap

                that they add to the base Samsung build of Android, or if it's a bug that's

                Samsung's fault that wasn't found during software testing, but I need to

                have this fixed ASAP.  And, just to make this VERY clear... doing a

                factory reset and restore isn't an acceptable solution to this problem.


                Alternatively, being able to remove Android Oreo and go back to Android

                Nougat would be acceptable and perhaps preferable.  My phone worked great

                with Nougat and had great performance and battery life.  As far as I can

                tell, for my device, Oreo is unnecessary, unwanted, flawed and makes

                undesirable changes to apps and the home screen that I simply do not want.

                4 of 4 people found this helpful
                • anatara43

                  6. Re: S7 Battery Drain With Oreo Update

                  Yes, I agree with c.a.chopp.ii. If we could go back to the old OS then I would prefer that as well. I'm also noticing the sluggishness and from what I've read, doing a factory reset doesn't help at all.

                  • mszenk

                    7. Re: S7 Battery Drain With Oreo Update

                    I agree and can attest that c.a.chopp.ii is absolutely correct. I am word-for-word experiencing the same problems. Battery life dropped overnight after this update. Everything is extremely sluggish and my phone is downright unusable. It was perfectly fine with Nougat. System updates like this SHOULD BE A CHOICE. This should not have been pushed on us.

                    • saiori

                      8. Re: S7 Battery Drain With Oreo Update

                      I just wanted to come here and add my voice to the list of users suffering from this.  I let the phone do it's update and then my battery started dying so much quicker than before.  On top of that I've noticed that when using apps that I used to use without issue (especially the camera) my phone gets incredibly hot.  Tonight I watched my phone go from 45% down to 12% in an hour and a half, and that was with the screen off for half that time. 


                      There is definitely something going on with the new release.


                      Oh how I wish I could just install a base version of Android.

                      • cyano5518699

                        9. Re: S7 Battery Drain With Oreo Update

                        I too am experiencing all the problems c.a.chopp.ii outlined.  My phone went from lasting all day, to dying within a matter of hours.  Much warmer than usual, android os unusually high usage when I check the battery usage.


                        Tmobile, this update sabotaged our phones.  Can you please provide us with a method to remove this update and roll back to nougat?

                        • tkhamouli

                          10. Re: S7 Battery Drain With Oreo Update

                          Same here. My battery life has been very poor due to this update. I have never experienced this issue before. Im calling who ever responsible for this on Tmobile to react please. A lot of folks out there are suffering the same effects and cant voice them selves....you maybe on the path to loosing more folks...

                          • iiiper

                            11. Re: S7 Battery Drain With Oreo Update

                            Then I think you need to do some research. Not a common issue?

                            It has been a known issue since the note.

                            My friend doesn't notice the issue on his note but 2 other people I know with the note have the issue.


                            In all honesty I would never buy another Samsung or tmobile device. Why? The support and quality is not there anymore.

                            My wife's honor 7x has been running oreo for a few months with ZERO issues. We also beta tested oreo with honor.

                            Cheaper phone does everything proper and performs great with a full day use possibly 2.


                            Seriously I can't even use location on my s7 ever since oreo. The 2nd anything tries to access location it crashes.

                            Have done everything I can to fix it. And tmobile probably will not release a update for another year. Since everyone knows tmobile is generally the last 1 to provide updates, fixes and security updates.

                            • jomanick

                              12. Re: S7 Battery Drain With Oreo Update

                              I am experiencing EXACTLY the same frustrating problems as c.a.chopp.ii and I completely agree that recommending a factory reset and restore is NOT an acceptable "solution". In fact, it is not a solution at all! I have been scouring the web for info and fixes to these issues and time after time moderators are instructing people to try the usual steps (which do not work) and then suggesting a factory reset.  Well, people have tried the factory reset and guess what...IT IS NOT FIXING ANYTHING.  These kind of updates should not be rolled out until they are completely tested and debugged.  Please, please, please give us a way to rollback to Nougat until you fix the mess that is Oreo.

                              • magenta5521706

                                Same thing. Battery draining like crazy.


                                And yes, what's with the terrible tiny font size?!

                                • magenta1944081

                                  14. Re: S7 Battery Drain With Oreo Update

                                  So frustrating...I literally can just watch the percentage of remaining battery (displayed at top of screen) just inching down rapidly, even when I am barely using the phone.  I've searched all over the web for solutions and nothing has really had an effect (I have not bothered with a factory reset as most people say it  doesn't help).  I had NO issues with this until that update was done a few days ago.

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