Blue Sea 7649 Mini Add-A-Battery Kit - Boxed Packaging

The Blue Sea 7649 Mini Add-A-Battery Kit is the compact, intelligent solution for boaters and anglers who demand reliable electrical independence on the water. Whether you're running navigation electronics, fish finders, livewells, or cabin systems, a dead start battery means a stranded boat—and the Mini Add-A-Battery eliminates that risk by isolating your starting battery from house loads that drain power during long days on deck. This kit is purpose-built for smaller vessels, center consoles, and tight engine compartments where space is at a premium.

At the heart of this system is Blue Sea Systems' proven battery isolator technology, which automatically connects a secondary house battery to your alternator for charging while keeping it electrically isolated from the start battery at rest. The Mini configuration delivers full functionality in a compact footprint—just 4 x 4 x 7 inches and weighing only 1.5 pounds—making it ideal for retrofit installations where traditional add-a-battery systems won't fit. The boxed packaging includes all necessary terminals, wiring, and fuses, so you get a complete, safe installation out of the box with no guesswork on component sourcing.

Serious anglers, charter captains, and cruisers benefit most from this kit because it lets you run demanding loads—GPS plotters, electric trolling motors, cabin refrigeration—without sacrificing engine start capability when you need it most. Installation is straightforward for anyone comfortable with basic marine electrical work, and Blue Sea's reputation for reliability means this isolator will outlast years of hard saltwater and freshwater use. The Mini Add-A-Battery Kit is the smart upgrade for any boater serious about staying powered up and stranded-free.