A wheelchair power supply system for providing backup power for an electric wheelchair includes an electric wheelchair has an armrest. A pouch is suspended from the armrest and the pouch has a plurality of apertures extending into an interior of the pouch. A power supply is positioned in the pouch and the power supply has a charge port for charging the power supply. The power supply has a plurality of outputs and each of the outputs is selectively and electrically coupled to an electronic device for charging. Moreover, the electric wheelchair is selectively and electrically coupled to one of the outputs such that the power supply serves as a backup power source for the electric wheelchair.