Technically Apple says playing video, surfing the web or listening to music. It sounds like 10 hours of use to me, probably some of each. It has a 25 watt-hour battery. Nothing huge, for comparison the MacBook Air has a 40 watt-hour battery. They don't break out what the iPhone/iPod Touch have.<p><a href="http://www.apple.com/ipad/specs/" rel="nofollow">http://www.apple.com/ipad/specs/</a>