Meet the Belkin Power RockStar 10000: a portable charger with a 10,000 mAh battery and 2 x USB ports to power your smart devices on the go. With 4.8 amps total power, it can charge two smartphones or tablets. The magnetized slot holds a 5.7-inch Lightning or Micro-USB cable.
The Power RockStar 10000 has an aluminum finish. It is available in smaller capacities as well. Costs under $100 at this time.[where to get it]