Mighty Jump Pocket Car Jump Starter and Power Bank A pocket-sized device that can charge up your car AND your phone? Really? Yes! It’s the Mighty Jump Pocket to the rescue. No more getting out of the car with dirty jumper cables to charge a drained battery. No more worries of dead cell phones when you really need to make a call. Enjoy priceless peace of mind that won’t leave your powerless with Mighty Jump.