Patent ID: 8312937

Claim:
A battery pack comprising: a housing for retaining a battery; a retention mechanism coupled with said housing, said retention mechanism for retaining said battery pack on a power tool, said retention mechanism including a pair of rails extending along said housing, the rails being located on opposite sides of said battery pack and facing outwardly, each rail including a first channel, said first channel adapted to receive a tab on the power tool to guide the battery pack into position on the power tool; and an electrical connector extending from said housing adapted for coupling with an electrical connector on the power tool for electrically coupling the battery pack with the power tool; wherein said rails further comprise an upper portion and a lower portion, the upper and lower portions being at least partially spaced from one another along a direction from the base to the top of the housing, the at least partial spacing being visible from the outward direction, with said first channels between said upper and lower portions; and wherein second channels are formed between an upper surface of the battery pack housing and the lower portions of the rails.