Mophie Juice Pack Boost / External Battery for iPod and iPhone - 1137_JPU-PWRSTATION Portable power solution for on-the-go Apple devices like the iPhone, iPod, and even the power-hungry iPad High-density, high-output battery charges at speeds of up to 2 amps--up to 4 times faster than traditional USB batteries Integrated stand-by switch ensures theres no drainage to the Powerstation's battery while it's not in use Check the fuel tank with the 6 LED charge status indicator Built-in short circuit, overcharge and temperature protection; backed by 1-year limited warranty