Tzumi Pocket Juice 4000 mAh/2.1A Output Portable Power Bank USB Charger Compatible with iPhones, Samsung Galaxys, Androids, Tabl Pocket Juice 4000 mAh rechargeable battery allows for up to 18 hours of talk time and 90 hours of music 18+ hours of talk time 90+ hours of music Includes USB connector compatible with most mobile devices