Patent attributes
Disclosed is a rechargeable payment card that can harvest charging energy from card readers. The rechargeable payment card includes a card body and electrical circuitry, a rechargeable energy storage device and a reader interface. The electrical circuitry and the rechargeable energy storage device are attached to the card body. At least a portion of the electrical circuitry needs power to operate when the card is not coupled to an external electrical energy source. The rechargeable energy storage device supplies power to said at least a portion of the electrical circuitry. The reader interface can draw an electrical current from a card reader when the card is coupled to the card reader via the reader interface. At least a portion of the drawn electrical current is used to charge the rechargeable energy storage device.
