Ipod functions that last 16 hours, while having Up to 5 hours Talk / Video / Browsing internet. I say hooray for this revolution.
http://gizmodo.com/gadgets/analyst-antics/break-out-the-fire-hoses-only-4-million-iphones-shipping-this-year-265398.php
http://www.apple.com/iphone/technology/specs.html
http://www.apple.com/iphone/technology/osx.html
http://www.usatoday.com/tech/wireless/2007-05-21-at&t-iphone_N.htm
http://www.lifehacker.com/software/from-the-horse.s-mouth/-265063.php