Patent ID: 7719233

Claim:
A battery pack comprising: a battery assembly including: a cell having a rectangular parallelepiped form including two parallel planes and four side surfaces, and having a protruding electrode on one of the side surfaces; a protecting circuit substrate having an external output terminal and a protecting circuit, and longitudinally disposed on the side surface of the cell; a first lead connecting one electrode of the protecting circuit substrate and the protruding electrode; and a second lead connecting the other electrode of the protecting circuit substrate and a side part of the cell, the side part being an electrode of a polarity different from a polarity of the protruding electrode; a case having an opening on one face and accommodating the battery assembly; and a label covering a part or all of the battery assembly and the case, wherein a substrate holder is provided that includes: a side plate interposed between the protecting circuit substrate and the side surface of the cell where the protecting circuit substrate is disposed; and a brim provided to protrude outward from the side plate in a direction of a thickness of the protecting circuit substrate by an amount not less than the thickness of the protecting circuit substrate.