Backpacks with USB interface

USB interface

— own USB port located on the outside of the backpack. From the inside, an external battery (power bank) is connected to such a port, after which USB can be used to charge smartphones and other gadgets. The key convenience in this case is that the user does not need to dig into the backpack and remove the power bank from it, and the connector is within easy reach and connecting gadgets to it is not difficult.