Tzumi Pocket Juice (White) External Battery Pack 4000 mAh/2.1A Output Portable Power Bank USB Charger Compatible with iPhones, Samsung Galaxys, Androids, Tablets and other Mobile Devices Pocket Juice 4000 mAh rechargeable battery Up to 18 hours of talk time Up to 90 hours of music Includes Micro USB Cable compatible with most mobile devices Compatible with iPhones, Samsung Galaxys, Androids, tablets and other mobile devices