I have not updated to Nougat yet but I have noticed a 30 % increase in battery usage coinciding with the release of nougat. In my case Google play and Android OS are both using much more battery then before the arrival of Nougat.
I tried turning off play store (which I assume has something to do with google play you mentioned) but that didn't help. No changes, still 3X battery usage whether using the phone or not, whether safe mode or not, same problem after factory reset and reset settings. I keep checking for updates.
It was "Sprint Store" 1921 S Loudoun St, Winchester, VA 22601
Looking on google, I see nothing but "Sprint Store", no repair centers. What should I be looking for?
I went to a Sprint repair store and after some convincing, they reflashed nougat. Their other suggestions were hardware repair service (they send it out for that) or a new phone. I explained that the extra drain started exactly when I installed nougat and there were no apparent hardware failures either before or after.
The phone seemed a little better at first, but drained 3X on the way home with car bluetooth (but no other usage of the phone). A better test will be having it idle for hours at a time tomorrow without a bluetooth connection. Also others have pointed out waiting for the new OS to settle in after reflashing. So I will post more results later.
Thank you for keeping us posted with the updates of this matter. We look forward to read from you with the results.
In this case, hopefully a software update from Samsung would work this out. We'd need to wait for them to push a new one.
Just updated the OS to version G920PVPS4DQF1 a few minutes ago. I rebooted and will see how it goes. It seemed to be drawing current, so I cleared the cache and rebooted. I will write later with power drain status. 5 hours, 13%, with a completely idle phone. 6% device idle, 5% Android System, 1% Google Services and 1% Cell standby. Should also mention that I turned off mobile data after noticing lots of TCP connections from the phone. That didn't help with battery.