Something you need to know about power saving..
UserscanmanuallyexemptappsusingSettings>App&Notifications>APP-NAME>Battery>BatteryOptimizationandthenselectingtheappto ...,TurnonbatterysavermodemanuallyOnyourphone,opentheSettingsapp.TapBatteryBatterySaver.Chooseascheduleforbatterysavermodeoraut...。參考影片的文章的如下: