A battery comprises a box body, insulating members, and at least one battery cell. The box body comprises first side beams and second side beams. The first side beams and the second side beams are connected and define an accommodating space. The at least one battery cell is located in the accommodating space battery cells adjacent to the first side beams are first battery cells, the maximum area surface of each first battery cell is a first surface, and the first surface of the first battery cell faces the corresponding first side beam. The insulating members are located in the accommodating space. Each insulating member is provided between the first battery cells and the corresponding first side beam, so that when the first side beam is impacted, the first surfaces of the first battery cells bear impact, reducing the impact deformation of the first battery cells.