| 摘要 |
PROBLEM TO BE SOLVED: To save a trouble required for charging during storage of a bunch of a plurality of batteries housed in boxes, to allow a part of the battery boxes to be easily cut off when a part of the bunch of the plurality of batteries are to be used, and to save wastes in space with a volume occupied by the boxes reduced as the batteries are used. SOLUTION: A connection piece for connecting boxes are provided at least two adjacent corners of a box body. The connection piece is connected with a side face of another box. Perforations for cutting off are provided at a foot of the connection piece. |
