Abstract: A power tool system includes first and second power tools, each having a mechanical connector and an electrical connector. At least one of the connectors of the second power tool is dissimilar from the connectors of the first power tool. The power tool system further includes a battery housing defining a cavity therein, a battery cell positioned within the cavity of the battery housing, a mechanical connector configured to mechanically couple with the mechanical connector of the first power tool, an electrical connector configured to electrically couple with the electrical connector of the first power tool, and an adaptor configured to removably engage a connector of the battery such that the battery is configured to couple to the second power tool when the adaptor is coupled to the battery and is configured to couple to the first power tool when the adaptor is removed from the battery.