I've always just ran the stock firmware that came with it. Not sure what update I was on, because I don't use the WiFi and don't get updates. Anyways, I was reading and it just cut off on me. I plugged it up and it came back up, but it said it had like 98% battery and not charging. I left it charged all night and used it today for a couple hours. It turned off and when I tried to turn it back on all it does it show the 'read forever' and restarts, it just boot loops. Also, instead of showing the 'read forever' sometimes it just flashes white and then reboots. Any ideas?