Also a suggestion. Pick up one of the battery chargers with a recondition mode. It's just a pulse charge that breaks up the sulfates hardened on the lead plates. If the battery sits too long it will become "sulfated" often a 24 hour series on recondition mode or two will have your old battery as good as new. I've been able to power my wheelhouse, boat, four wheeler and 2 vexilars for 5 years now, on batteries that friends were going to throw away because they wouldn't accept a full charge.