Patent ID: 8353364

Claim:
A battery pack to be loaded in a handle portion of a hand-held electric tool, the battery pack comprising: three battery cells, one battery cell of the three battery cells being situated on a front side of a tool main body, the remaining two battery cells being situated on a rear side of the tool main body while being arranged laterally side by side, with the three battery cells being arranged in a triangular configuration whose apex portion is situated on the front side and whose base is situated on the rear side, and a pair of right and left fixation claw portions configured to be engaged with the handle portion, the fixation claw portions being equipped with finger-rest portions inclined in such directions that they approach to each other toward the apex portion, the fixation claw portions being configured so that an engagement with the handle portion is canceled when the finger-rest portions are pressed in such directions that they approach to each other, the finger-rest portions being provided with anti-slip portions configured to prevent fingertips from slipping toward the apex portion.