I don't think it's normal. I got the phone less than a month ago. It's running 8.1 since the day I got it. I've tried turning off Cortana, sync settings, WiFi sense, email sync settings, location, Bluetooth, background tasks, etc...
Any ideas?
By the way, the same happened with my 620 (it lasted even less..).
Any ideas?
By the way, the same happened with my 620 (it lasted even less..).