A charging device for a light includes a light body and a charging assembly which is connected to the light body. The light body has a printed circuit board disposed therein. The charging assembly is electrically connected to the printed circuit board. The charging assembly has a base, an electrical connecting plate and a plurality of wires. The electrical connecting plate is connected to one side of the base. The wires are connected to another side of the base. The electrical connecting plate pivots and bends relative to the base. A plurality of metal conductors is disposed on the electrical connecting plate. Under this arrangement, when the light body needs to be charged, the electrical connecting plate is pulled up and inserted into a port of a computer.