Abstract: A circuit interconnecting device for a power tool of the type having a compartment for a replaceable battery is provided. A base is adapted for mounting in the battery compartment. The base receives one end of a power cord and includes an extension that has a proximal end adapted for plug-in engagement with the base, and a distal end adapted for electrical interconnection with a pair of electrical contacts of the power tool. A power cord has at one end a plug for electrical interconnection with a power source socket, and at the other end is adapted for engagement with the base, such that an electrical interconnection between the power cord and the distal end of the extension is provided. A cover is mounted and slidably engaged with the extension in such a manner that the cover may be moved to expose contact surfaces of the distal end of the extension or to cover the contact surfaces to prevent electrical shock when the device is removed from the power tool.