It's a guess on my part but I think the compartment for the batteries has the capability of housing 2 batteries but the dealer is the one putting in a battery as part of the sales deal. He may even charge extra for it but most include it in their price. Two six volt batteries from a dealer would be a nice gift but you will have to negotiate that if you want six volt batteries. I think most dealers include a 24 or 27 series 12volt battery.