Miccus ChargeBlock for iPhone/iPod Mini External Battery Pack for all iPhones and Most iPods

Compatible - recharges any iPhone or iPod with a 30pin dock connector (does not work with any iPod shuffle)
Easy to Use - Has three indicator lights. Blue LED signals when fully charged and the two Red LEDs signal the ChargeBlock capacity (above or below 50%).
Smart technology- protective circuit designed to prevent your iPhone or iPod from overcharging which can decrease the iPhone battery lifecycle.
Operating times- Get up to 11 hours of audio, 3.5 hours of talk, 3 hours of video and 2.5 of internet from a single charge (results vary by model)