The invention discloses an apparatus and method for charging movable devices like carts or trolleys. Each movable device includes a charging unit and a charging connector coupled to the charging unit, including a male plug at one end, a female socket at the other end, and two electrodes interconnected. When the devices such as trolleys are in a queue, the male plug of the connector of a device in the rear is connected to the female socket of the same in the front so that a plurality of movable devices are connected to each other in tandem and charged simultaneously. The method comprises connecting the plurality of devices in tandem with the respective connectors so that the devices can be charged simultaneously. According to the invention, a plurality of movable devices can be charged simultaneously and the charging process can be simplified, thereby improving the utilization and safety of the movable devices and reducing the cost of maintenance.
