Abstract: The present disclosure relates to systems and methods for renting portable power units (also known as portable chargers) from a terminal, kiosk, machine, or any other physical unit that is capable of autonomously processing (including crediting) rental payments, autonomously distributing one or more power units to a renter subject to such payments, and autonomously facilitating the return of the one or more power units at the same (or a different) related rental terminal, kiosk, machine or unit.