Abstract: A battery structure and a charging device adapted for the battery structure are provided. The battery structure comprises N battery cells, (N?1) movable connectors, and a protection device, wherein N is a positive integer greater than one. The charging device comprises an open circuit device and a power supply. The N battery cells are arranged next to each other, and each battery cell has two junctions. When the battery structure is discharging, each movable connector electrically connects the two adjacent junctions of the every two adjacent battery cells, with all the battery cells cascaded. When the battery structure is charged by the charging device, the open circuit device will enable the movable connector to disconnect the two adjacent junctions of the two adjacent battery cells so that there would be open circuits between every two adjacent battery cells. Then, the 2N charging junctions of the power supply charge the junctions of each battery cell individually.