1. Cs342's Avatar
    Hi guys,
    I have a S7 Edge and I've been having this problem for quite a while, since around 2 months after buying my S7 Edge. I finally can't take it anymore so I'm posting here.

    My S7 Edge gets terrible battery life when I'm actually using the device. The phone will drain from 100 percent to 88-89 percent in under 20 minutes during a short bus ride to work, while I'm using Whatsapp, surfing the web and/or listening to music. When I go into battery usage, Android System is at the top of the list, even higher than the Screen which is set to the max resolution and not 1080p. I updated to Nougat and battery life is just as bad, although it didn't get worse after the update.

    The weird thing is Android System uses almost no battery when my device is idling, and I lose only 2-3% overnight.

    I've already tried wiping the device cache partition, resetting all app preferences, and turning off sync.Is there any way to fix this? Thanks so much!

    Android System draining battery ONLY WHEN IN USE-19024853_10211067014925157_805818555_o.jpg
    Attached Thumbnails Android System draining battery ONLY WHEN IN USE-18987446_10211067014685151_443395375_o.jpg   Android System draining battery ONLY WHEN IN USE-19022385_10211067014805154_1402191214_o.jpg  
    06-06-2017 08:51 PM
  2. underway99's Avatar
    If you're noting an increase in battery drain while you're commuting, it could be because the phone radio is constantly having to find and keep a network connection while moving. That along with your usage of the device could a large factor.

    As to the other times that you use the device, I'd say that your 13 hours of life (if your screenshots show typical use) seems a little bit low. But you also show five hours SOT, which is really good.

    If you're really concerned, I'd recommend that you run in safe mode for a few days to see how the device works using just the apps that came on the phone with default settings. You won't lose anything. Then you can identify the source of whatever (if anything) ails your battery.
    PJRed2008 and Cs342 like this.
    06-08-2017 04:12 PM
  3. PJRed2008's Avatar
    I agree with @underway99 ,I don't think you have much of an issue. Social apps in particular seem to use lots of battery and @underway99 made an excellent regarding your commute.
    Cs342 likes this.
    06-08-2017 04:18 PM
  4. Cs342's Avatar
    I'm just concerned that Android System is using much more battery than the screen. This doesn't seem to happen to anyone else I know in person who has a S7 Edge. Also, I usually get closer to 4 hours SOT, not 5. I guess I was just lucky when I took that screenshot.
    06-09-2017 01:34 AM
  5. Cs342's Avatar
    Snapchat only uses 2% while Android System uses 15%, so I don't think social apps are the problem in this case, are they?
    06-09-2017 01:35 AM
  6. PJRed2008's Avatar
    so I don't think social apps are the problem in this case
    In this particular case, at this particular time, wouldn't appear. But, keep in mind that the OS is always on, always watching and always active, it never sleeps or takes a break, so even if the phone is doing "nothing" the OS is.
    06-09-2017 11:26 AM
  7. Cs342's Avatar
    In this particular case, at this particular time, wouldn't appear. But, keep in mind that the OS is always on, always watching and always active, it never sleeps or takes a break, so even if the phone is doing "nothing" the OS is.
    But why would Android System use more battery than the screen, yet I have no battery drain when the phone is idle?
    06-09-2017 09:41 PM
  8. PJRed2008's Avatar
    But why would Android System use more battery than the screen, yet I have no battery drain when the phone is idle?
    Good point, but remember that when the screen is on, what is controlling it? OS. And on screen time is relative, just sitting there with the screen on, or playing some ferocious game, will have different results. You do have battery drain when the phone is idle, but much less then when in use.
    06-10-2017 10:45 AM
  9. Cs342's Avatar
    Good point, but remember that when the screen is on, what is controlling it? OS. And on screen time is relative, just sitting there with the screen on, or playing some ferocious game, will have different results. You do have battery drain when the phone is idle, but much less then when in use.
    Is it worth doing a factory reset then? I don't want to reset the phone if it won't solve the problem. If Android System really is supposed to use that much battery on the S7 then I'll leave it.
    06-11-2017 07:44 PM
  10. PJRed2008's Avatar
    Is it worth doing a factory reset then?
    It wouldn't be to me. If it gets to be a real problem you may have to go that route, but I'd wait until it was absolutely necessary just due to the hassle.
    06-11-2017 09:42 PM
  11. Chaos Beck's Avatar
    GUYS I FOUND THE SOLUTION!

    So i sum up all the problems regarding android system battery drain in s7 edge and after applying this settings i got my battery running normal again.solutions are as follows

    1. Clear data from google services
    2. Force stop chrome , facebook
    3. Smart alert off
    4. In oreo restrict background usage of android system
    5. Check that your cell signal are not low
    6. Wifi always turn on select never
    7. Google backup off

    I applied all those settings and in upcomming time i will check what was the give culprit
    06-22-2018 03:52 PM

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