Each time we test a tablet we check the battery life for web browsing over wi-fi, over 3G (if relevant) and for video playback. To keep the tests fair we set the screen brightness to 200 nits (a reasonable daytime brightness level) using a light meter to ensure no tablet has an unfair advantage by using a low default brightness setting. We also test how long the battery takes to fully recharge.
As you can see in the graphics below, Apple wins both categories hands down. The Apple iPad with Retina latest for 811 compared to 590 for the iPad 2 and 532 for the Samsung Galaxy Tab 2 10.1.
The iPad mini also topped its category lasting for 783 compared to 591 for the Amazon Kindle Fire HD and 550 for the Nexus 7.
Read More [via Rob]