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, a starter motor configured to start the internal combustion engine, and a continuous duty electrical load. The voltage output terminals of the lithium-ion battery and the battery receiver are configured to connect to complete a circuit between the rechargeable battery and the continuous duty electrical load when the rechargeable battery is attached to the battery receptacle.