SECONDARY BATTERY UNIT AND HUMANOID ROBOT

A secondary battery unit includes a first secondary battery module disposed at at least either one of a front part or a back part of a body of a humanoid robot, a second secondary battery module disposed around the body in a direction intersecting with a front-and-rear direction of the body, and a base coupling the first secondary battery module to the second secondary battery module. The base is detachably attached to the body, together with the first secondary battery module and the second secondary battery module.