US Patent 10559967 Switchable interface for power tools

Disclosed is a power tool including a control device and at least one electromechanical interface device for connecting at least one rechargeable battery to the machine tool and supplying the power tool with voltage from the rechargeable battery. The interface device includes at least a first terminal and a second terminal and can be set to at least one first position and to a second position; the first terminal can be used for supplying the power tool with voltage from the first rechargeable battery when the interface device is in the first position, and the second terminal can be used for supplying the power tool with voltage from the second rechargeable battery when the interface device is in the second position.