iconia a1 b71

I am having battery problems with my iconia. It started out showing a warning for an over temp battery, even though I had just turned on a fully charged tablet for 5 minutes. The warning telling me to shut down and let it cool off. Let it cool off, it was only 5 minutes! This has been going on for the past week or so.

Last night, after charging 9 hours, disconnected from the charger and sitting for another 2 hours I restarted the tablet, about 5 minutes later I get the over temp warning again. I shut down for 30 minutes, restarted the tablet and again in about 5 minutes it is warning me of over temp battery....looking up I see the battery is completely dead.