Today I had an issue where after using the tablet outside at 90F until about 20% battery I plugged it in inside the house to let it charge. Maybe 30 minutes later I tried to wake it and it was completely unresponsive. No battery charge screen, no ability to wake it and unable to boot into the Android recovery menu. After fiddling around for an hour with no luck I decided to throw it in the freezer for a few minutes to see if I had hit a thermal limit. Plugged it back into the charger and immediately got the charge icon and was able to boot Android. I must have hit a thermal limit using it outside and it took a while to get the internal temperature low enough to function again.