Patent ID: 7005831

Claim:
A system of cordless power tools comprising: a rechargeable battery pack having a housing, a terminal block and a keying feature, the housing being formed with a pair of guide rails and a pair of guide grooves, the guide rails being laterally spaced-apart from one another and extending in a direction generally parallel to a longitudinal axis of the rechargeable battery pack, the guide grooves extending generally parallel to the guide rails and being vertically spaced apart therefrom, the terminal block including a positive blade terminal and a negative blade terminal, the keying feature being coupled to one of the housing and the terminal block and extending generally parallel to the longitudinal axis of the battery pack; and a power tool having a tool housing, a positive tool terminal and a negative tool terminal and a mating keying feature, the tool housing defining a pair of rails and a pair of grooves; wherein the guide rails, the guide grooves and the keying feature cooperating with the grooves, the rails and the mating keying feature, respectively, to align the positive and negative blade terminals with the positive and negative tool terminals, respectively, when the battery pack is slidably engaged to the power tool along an insertion axis that is generally parallel to the longitudinal axis of the battery pack.