Digital Treasures ChargeIt Portable Power Pack for Smartphones - Retail Packaging - Blue Works with iPhone 4 and earlier models, iPod, BlackBerry, digital cameras, hand-held game consoles and more. More than doubles your iPhone battery life when used with the included batteries. Use your phone/device while charging. Ideal for long flights/commutes where AC power isnt available. Portable charger Runs off 4 AA Batteries which are included Never be without power again