An electric starting system for an internal combustion engine is provided. The starting system includes a rechargeable battery including two voltage output terminals and an enable terminal, a battery receiver including a battery receptacle configured to receive the rechargeable battery, two voltage output terminals, and an enable terminal. Each of the enable terminals is positioned remote from the related voltage output terminals. The voltage output terminals of the rechargeable battery and the battery receiver are configured to connect to complete a circuit between the rechargeable battery cell and the starter motor when the rechargeable battery is attached to the battery receptacle. The enable terminal of the rechargeable battery must be connected with the enable terminal of the battery receiver for the rechargeable battery to receive an enable signal to allow the rechargeable battery to provide power to the starter motor to start the internal combustion engine.