According to The Tech Report NVidia is recalling some Shield tablets due to a battery fire risk [techreport.com].
Some Nvidia Shield Tablets built between July 2014 and July 2015 could pose a fire risk. The batteries in the affected tablets can apparently overheat to dangerous levels. As a result, the company has issued a recall notice. The recall applies only to tablets that show a battery model of Y01 on the About Tablet screen in the Settings application.
PCWorld reports that this affect 88,000 tablets [pcworld.com].
Further coverage at Ars Technica [arstechnica.com].