NVIDIA just issued a massive recall on their Shield Android Tablets due to a possible overheating fire-hazard in their batteries. The recall effects SHIELD™ 8-inch tablets that were sold between July 2014 and July 2015. NVIDIA will replace affect tablets at no charge to owners.
You can manually check to see if your tablet is covered under the recall. Just head to the Settings menu, click "About tablet," then "Status," and check out the "Battery" section. If your battery section reads "B01," then you are NOT affected by the recall and have nothing to worry about. If you see "Y01," then your tablet falls into the risk category and you should arrange for a replacement.
To take advantage of the recall program (and/or find out more info) you should visit www.nvidia.com/support/tabletrecall.
Source: Notice for NVIDIA Tablet Customers