Hi, i have tried a number of things but nothing seems to help. interestingly it only occurs on the android system. If on Windows, the battery is actually very good. They completely drain while on standby. I can charge them to 100% and within 8 hours the tablet is completely drained while in standby mode when using the android system. I have reset the devices, turned off location services, screen brightness to lowest setting etc and nothing changes. The tablets are virtually unusable as there is never any battery left after letting the tablet sit for a few hours. It is like the tablet is always searching for cell connecively or something while on standby.