^1 0n the dual Pro charger. I have two of them on my boats and both have worked great for me. They are rather costly, but they can be removed and used on another boat or for charging other batteries when needed. The small battery maintainers are cheaper and will keep the battery at full charge when not in use. Simply use a drop cord with two receptacles for both units. I use them on my motorcycle and lawnmowers when needed. Guess it depends on just how much one wants to pay for being able to charge and maintain batteries. JMO
Oldman570
