Nobody would take a lot of cash with them in the journey, would they? People take their bank cards & withdraw money from ATM machines on the road. In the same way, you can deposit power in the bank & withdraw it whenever you need. This mobile digital power bank features the high-performance built-in Li-Ion battery & it offers power supply for your electronics including cell phones. Brand new 2600m Ah power charger external battery bank High capacity & high compatible Durable, lightweight, ultra slim design Electricity-saving function User friendly, long cycle life & rapid charge Environmental friendliness & Economic efficient