Apad rockchip. This is my third day and its being sent back to China. I have stock firm in it. Problem.....Keeps powering down, and will not boot at times. Not sure what is going on could be a battery issue. It says its 100% charged red light goes out, when I unplug it drops to 86%. Plug in again same problems. I follwed the 10 hour charge also. lol I just think I found the issue. if I push around the sleep button in the middle it turns off. So there is something inside going on around the middle button.