A battery includes a first electrode, a second electrode, a first layer, and a housing. The first electrode includes a first conductor having a first face and a second face, and a first metal plate connected to the first face. The second electrode includes a second conductor having a third face and a fourth face, and a second metal plate connected to the third face of the second conductor. The first layer includes an insulating material and is connected to a first surface of the first metal plate and a third surface of the second metal plate. The housing includes a first part and a second part, and covers the first electrode, the second electrode, and at least part of the first layer through the first part and the second part, where at least part of the first part is connected to the first layer.