Originally Posted by LakeSuperiorGeezer
I always float my lead acid batteries, whether deep cycle of starter batteries when there is infrequent use. Here is a web site that explains: How Does A Float Charger Work?
Drivel and quite unnecessary.
Charge the batteries up, disconnect them and store them in a cool place. Do what Maine Sail suggests.
Bill's right, too, but if the boat is in a "warmer" environment, most likely the folks are using the boat. Warmer weather = higher self discharge. Pretty easy to figure out: charge once a month, but don't leave 'em on float, because of what Bill said.
You could also thumb around the Ample Power Primer, download from the tech tab at Ample Power Company Home Page