I was using my android tablet (MID--google tablet) and the battery was getting low. I plugged it up to charge and when I went back to use it about an hour later, there was a black screen with a battery on it. There is a triangle with an exclamation point in it. I unplugged the charger and tried to turn it on, but when I hold the power button, that pops up instead of starting the tablet. I have no idea what is wrong with it or how to fix it. Any ideas? What can I do to fix it?? I use my tablet ALL the time! I really appreciate the help...TIA!