Jump-starter battery pack charges your phone, jump-starts your car and fits in your pocket. Battery pack holds enough power to jump-start six to eight-cylinder cars, boats, trucks and motorcycles. USB connection lets you also charge smartphones, laptops, tablets and speakers. The 12-volt, pre-charged 18,000 mAh battery fully charges in three hours. Battery pack provides more than a thousand charge cycles and is guaranteed safe to be used with shockproof cables. It automatically turns off to save you energy when forgotten. Small enough for the glove box, center console or your pocket, this black, soft-touch finish battery pack is designed to fit conveniently in most places.