Depends on what you play and what is turned on . I get from a full charge between 4-6 hours with screen brightness at 50%. However the battery reader usual is a bit weird it will stay stuck for ages on 74%, 64%,49% and 31%. The biggest drain on the battery is 'standby wifi' and the screen. It is brilliant but with headphones I had no audio lag, however with Bluetooth headphones I have had to play around with most emulator audio settings to reduce/eliminate slight audio lag. But I don't have this problem with the ordinary speakers. It is quite stable but the stock launcher loses apps on the windows whenever they update, but if you use apex it is fine, however with apex it will reset the first time you use a widget, but will be fine afterwards. So obviously after you have set it up it is fine. I love it.