Patent ID: 8758933

Claim:
A battery comprising: a battery cell including two major surfaces, two sidewall surfaces, a front face, and a rear face, and a positive portion and a negative portion to transfer energy from the battery cell are formed on the front face; a battery housing including a main wall portion, a reverse wall portion, two sidewall portions, including a left sidewall portion and a right sidewall portion, and a back surface side, and the battery housing is configured to store the battery cell therein; a battery cover including a positive terminal and a negative terminal; a holder attached to the battery cover; a positive electrode tab to connect the positive portion of the battery cell to the positive terminal of the battery cover; and a negative electrode tab to connect the negative portion of the battery cell to the negative terminal of the battery cover, wherein the battery housing includes, on at least the main wall portion, an opening portion formed internally of outer edges of the main wall portion along the outer edges to cause one of the major surfaces of the battery cell to face outward, the left sidewall portion being connected to the right sidewall portion via the back surface side and the opening being between the left sidewall portion and the right sidewall portion, a first cross-sectional U shape is entirely formed on the main wall portion of the battery housing, and the main wall portion of the battery housing overlaps part of the one major surface of the battery cell, and wherein the holder includes an opening and a guide portion, the negative electrode tab passes through the opening, and the positive electrode tab contacts the guide portion on a perimeter of the holder.