You should check wi-fi settings. Settings - wi-fi - top three dots - advanced - network notification.
If still is the same please perform factory reset or flash system with SPFT.
Hi,
That's better to use a dedicated third party app like GSam Battery Monitor to check the battery usage in details. The embedded system tool is not really optimized yet.
lukazzo replied at 2017-1-11 07:04
already checked and is deactivated network notification, but you know if is a common problem on th ...
Also you can change in WiFi settings (settings - wi-fi - three dots in top right corner - advanced - keep wi-fi on during sleep - never or only when plugged in
This two settings stop activating wifi while you are in range