Machan try to reboot the phone in safe mode before going to sleep and observe it for 2 nights. If the battery works fine, then that’s an indication that one of your apps is to blame. Here are the steps to restart your phone in safe mode:
1 Turn off the phone completely.
2 Press and hold the Power key.
3 Once ‘Samsung Galaxy Note5’ shows, release the Power key and immediately press and hold the Volume Down button.
4 The phone will restart but keep the Vol Down button pressed.
5 Once the phone has finished restarting, ‘Safe mode’ will be display in the lower-left corner of the screen.
6 You may now release the Volume Down button.
You can also do a factory reset to the phone, as long as there’s no hardware issue involved, factory reset should easily take care of the battery drain issue. Here’s how to do it:
1 Turn off your Samsung Galaxy Note 5 completely.
2 Press and hold the Volume Up and the Home buttons first, and then press and hold the Power key.
3 Keep the three buttons pressed and when ‘Samsung Galaxy Note5’ shows, release the Power key but continue holding the other two.
4 Once the Android logo shows, release both the Volume Up and Home buttons.
5 The notice ‘Installing system update’ will show on the screen for 30 to 60 seconds before the Android system recovery screen is shown with its options.
6 Use the Volume Down key to highlight the option ‘Yes — delete all user data’ and press the Power key to select it.
7 When the process is complete, use the Volume Down key to highlight the option ‘Reboot system now’ and hit the Power key to restart the phone.
8 The reboot may take a little longer to complete but don’t worry and wait for the device to become active.
