Small engines, such as those in a golf cart, use a 6V battery. So do camping lanterns, toy cars, model boats and large flashlights. Stay stocked with a supply of replacement batteries so you are never without power.
Shop for a rechargeable 6V battery that comes with a charger, to renew available power, or a battery pack containing battery cells connected for more amperage. When replacing the battery, make sure the positive and negative terminals line up with the appropriate contacts.