Provided are a pack main body of a substantially rectangular parallelepiped shape in which a battery cell is embedded, and a terminal portion provided on a front face of the pack main body. The pack main body includes bevelled portions at corner portions formed by a top face and a bottom face and opposite side faces. The terminal portion is provided, in a protruding manner, on the front face at a position biased with respect to centre lines in a width direction and a height direction. The corner portions on one side have a chamfered shape and the corner portions on the other side have a rounded shape. Representative Drawing Fig. 5
