The North Face Inductor Charged Backpack, TNF Black, One Size nylon Imported zipper closure Joey T55 battery pack offers a removable, rugged water- and crush-resistant lithium polymer battery pack (developed specifically for the outdoor industry) that provides up to three-and-a-half full phone-battery charges and several days of partial charges. Front D-door pocket features a charging dashboard with a Joey T55 battery pocket and hub holder, padded fleece-lined tablet pocket and fleece-lined media pocket. External zippered pocket and zippered slash pocket allow for quick access to the internal tablet pocket from the outside. Two external, zippered, fleece-lined pockets for additional electronics storage. Dedicated 13" lay-flat laptop compartment allows for quick, checkpoint-friendly travel