They have created a nice infographic to show how each tablet performed in the battery tests.
As you can see, iPad Air beat all the tablets in the battery tests, while browsing the internet as well as while watching video.
In the internet browsing test, iPad Air’s battery lasted for 658 minutes, which is nearly 11 hours. The Retina iPad mini came in second place, its battery lasted for 614 minutes (just over 10 hours). Surprisingly, the iPad 2, which was launched in 2011, took the third place. Its battery lasted for 590 minutes (almost 10 hours). Galaxy Note 10.1 lasted for only 483 minutes (8 hours), Kindle Fire HDX 8.9 lasted for 481 minutes (8 hours) and Google Nexus 7 lasted for only 416 minutes (less than 7 hours).
In the video test, iPad Air again took the top honors. iPad Air’s battery lasted for 777 minutes (almost 13 hours). Amazon Kindle Fire HDX 8.9 came in second, it lasted for 714 minutes (almost 12 hours), followed by Google Nexus 7, which lasted for 669 minutes (just over 11 hours). iPad 2 and Retina iPad mini came in next with 660 minutes (11 hours) and 604 minutes (just over 10 hours respectively). Galaxy Note 10.1 (2014 Edition) came last, its battery lasted for only 465 minutes (less than 8 hours).
[via Which? Tech Daily]