MI 8 SE fast battery drain

[Dunno]

Anyone is experiencing? I bought the a couple of weeks ago. I flashed MUII 10.2 8.11.1. I don't know it is the firmware or the phone itself

 

[Omadead457]

how strange, I with that firmware feel that the battery lasts longer. Change to stable and now if it is the Cellular. My firmware is 8.11.15 Android P