A battery includes an electrode body including a positive electrode body and a negative electrode body and an exterior body in which the electrode body is housed. The exterior body includes a first container formed in a bottomed cylindrical shape and including a first circumferential wall section, a second container formed in a bottomed cylindrical shape and including a second circumferential wall section surrounding the first circumferential wall section, the second container housing the electrode body between the second container and the first container, and a fusing member interposed between the first circumferential wall section and the second circumferential wall section and fused to the first circumferential wall section and the second circumferential wall section.