https://www.youtube.com/watch?feature=player_embedded&v=3fd3ZLEYUvI
If you’re an iDevice power-user and need a classically robust bag to haul all your junk, take note: Timbuk2 has just released the Power Series, two alternate versions of their best-selling Commute Laptop Messenger and Q Laptop Backpack, equipped with Joey batteries and special a pass-through for the charging cable.
Of course, with each bag priced at $199, you could always buy your own batteries and stick them in the original versions of the bags, which are about half the price of the Power versions.