Blue Sea 7649 Mini Add-A-Battery

7649 mini add-a-battery. What does the mini add-a-battery do?. Adding a second battery prevents getting stranded with a dead battery by isolating the start battery from the house loads that can quickly discharge a battery. The mini add-a-battery offers a compact, simple way to control the switching with the m-series dual circuit plust battery switch and automatically share a single source of charging between two batteries with the mini acr automatic charging relay. Manufacturer: blue sea systems. Electrical-battery managementafd = none. Amps - max = 65 amp. Lockable = none. Positions = none.