iPad mini: 10 hours
Google Nexus 7: 8 hours
Amazon Kindle Fire HD: 11 hours
When it comes to longevity, the Amazon Kindle Fire HD takes the cake.
Amazon claims its newest 7-inch tablet can run up to an impressive 11 hours, while the iPad mini trails behind (closely) with 10 hours. Google finishes last in this category, with its Nexus 7 getting up to eight hours of active use.