Disable Background Syncing of Apps
If you have activated auto-sync of data on your device, one way to reclaim battery juice is by switching it off. Of course, auto-sync makes sure you get all your updates as soon as possible and if you don’t wa...
Have a look at: https://www.maketecheasier.com/stop-android-apps-from-starting-by-themselves
There you can find detailed instructions to address this problem. Hope this helps.