Miccus ChargeBlock Mini Portable Battery Charger for iPhones/iPods - Black Simple - Connect the ChargeBlock and keep using your iPhone or iPod while it recharges. Compatible - Made for iPhone and iPod certified- recharges any model iPhone and iPod with a dock connector (30pin). Easy - three indicator lights. Blue LED signals when fully charged and Red LEDs signal the remaining ChargeBlock capacity. Smart technology- protective circuit designed to prevent your iPhone or iPod from overcharging, which can decrease battery life. Operating times (Based on iPhone 3GS) - Up to 11 hours of audio, 3 hours of talk, 3 hours of video and 2.5 of internet (results vary by model).