1. AC Question's Avatar
    I have my s7 for about 3 months now. The battery performance was excellent for the first month. It would last well over a day even with heavy use. My battery performance lately has been horrible. I found that the battery performance has changed with the latest update
    I have taken the phone in to Samsung Center in Morningside. They erased the device and reloaded the software. They've attributed the poor battery to bad network reception. My reception in the office isn't great but I am always on Wifi. I have also been in the same home and office when the battery was great, so the reasoning does not make any sense.

    The other strange thing is when I use the original charger that came with the device but use normal charging (not fast charge) the battery takes over 12 hours to charge to full which doesn't seem right. On fast charge it seems fine

    I don't know what else to do. I am using Telkom mobile and have even forced roaming on MTN thinking it to be the network
    01-04-2017 07:12 AM
  2. nadeemkola's Avatar
    I have my s7 for about 3 months now. The battery performance was excellent for the first month. It would last well over a day even with heavy use. My battery performance lately has been horrible. I found that the battery performance has changed with the latest update on 1 November as shown in the link below

    https://www.sammobile.com/firmwares/.../SM-G935F/XFA/

    I have taken the phone in to Samsung Center in Morningside. They erased the device and reloaded the software. They've attributed the poor battery to bad network reception. My reception in the office isn't great but I am always on Wifi. I have also been in the same home and office when the battery was great, so the reasoning does not make any sense. Please find attached my battery performance for today.

    The other strange thing is when I use the original charger that came with the device but use normal charging (not fast charge) the battery takes over 12 hours to charge to full which doesn't seem right. On fast charge it seems fine

    I don't know what else to do. I am using Telkom mobile and have even forced roaming on MTN thinking it to be the network
    01-04-2017 07:32 AM
  3. belodion's Avatar
    Do your battery usage stats indicate anything unusual after a day's normal use?

    Sent from mTalk
    01-04-2017 08:35 AM
  4. Golfdriver97's Avatar
    Welcome to the forums. Could you show screenshots of the battery stats, please?
    01-04-2017 08:45 AM
  5. nadeemkola's Avatar
    01-04-2017 11:41 AM
  6. B. Diddy's Avatar
    Merged duplicate threads.

    It'd help to see more stats. Charge up to 100%, then let it drain to 20-30% with normal usage, without charging in between. Then show us:

    1. The main Settings>Battery screen.
    2. The fullscreen battery graph screen (which shows Awake time and Cell Signal Strength).
    3. The Screen category (to see total Screen On time).
    4. The Cell Standby category, if present (to see Time Without Signal).


    Use GSam Battery Monitor to get the Cell Signal Strength graph.
    01-04-2017 04:38 PM
  7. nadeemkola's Avatar
    01-05-2017 12:07 PM
  8. nadeemkola's Avatar
    01-05-2017 12:10 PM
  9. nadeemkola's Avatar
    01-05-2017 12:12 PM
  10. B. Diddy's Avatar
    Those screenshots confirm that your cell signal is generally poor, so that's probably the main reason. It doesn't matter if you have wi-fi on while you're in your office -- if the cell radio is still on, that will suck energy as the phone struggles to maintain a good signal. You could consider turning on Airplane Mode while in your office to turn off the cell radio (after which you can still turn wi-fi back on), but of course this means you won't be able to make or receive calls, unless you use a VoIP service like Skype or Google Voice/Hangouts Dialer.
    01-05-2017 03:43 PM
  11. nadeemkola's Avatar
    I see my 2g signal is a lot better. Is it possible to automatically change to 2g when I am connected to wifi. I tried to set it up on IFTTT but can't seem to find the option

    Alternatively is there a way to adjust the threshold so the phone would drop to 2g when there is no signal in place of trying to find 3g
    01-06-2017 01:07 AM
  12. Golfdriver97's Avatar
    I see my 2g signal is a lot better. Is it possible to automatically change to 2g when I am connected to wifi. I tried to set it up on IFTTT but can't seem to find the option

    Alternatively is there a way to adjust the threshold so the phone would drop to 2g when there is no signal in place of trying to find 3g
    First one Tasker may be able to do. As for the second one, I don't think that can be done.
    01-06-2017 08:55 PM
  13. ronfc's Avatar
    Alternatively is there a way to adjust the threshold so the phone would drop to 2g when there is no signal in place of trying to find 3g
    I don't think there's such a way to do this, but the device should switch automatically to the strongest signal as long as your Network mode is set on 'LTE/3G/2G (auto-connect)'.
    01-08-2017 06:21 AM
  14. marygio's Avatar
    I just did an update on my phone and now it wont hold a charge more than a couple of hours. any help would be helpful!
    03-13-2017 12:46 PM
  15. Rip's Avatar
    I had the same issue marygio. This morning I did a cache reset and it seems to be better now.
    03-13-2017 07:28 PM

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