Price: $175.66 - $141.23
(as of Jul 30, 2025 14:41:35 UTC – Details)
Adding a second battery to the electrical system prevents the unintended discharge of the engine start battery. Blue Sea Systems popular Add-A-Battery kit was primarily designed for boats with alternator output of 120A or less. When installed, the Add-A-Battery isolates the start battery from the house loads which prevents the discharge of the start battery. The Add-A-Battery offers a simple way to control the charging and battery switching of two battery banks. The E-Series Dual Circuit Plus Battery Switch simplifies the switching while the SI-ACR automates charging between two batteries.
Is Discontinued By Manufacturer : No
Product Dimensions : 6 x 5 x 4 inches; 1.5 Pounds
Item model number : 7650
Department : mens
Batteries : 1 Unknown batteries required.
Date First Available : October 1, 2001
Manufacturer : Blue Sea Systems
ASIN : B000RZNP5K
Country of Origin : USA
Best Sellers Rank: #25,702 in Automotive (See Top 100 in Automotive) #56 in Automotive Replacement Battery Switches
Customer Reviews: 4.8 4.8 out of 5 stars 656 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
Simplifies switching
Isolates engine and house circuits
Tin-plated Copper studs for maximum conductivity and corrosion resistance
Automatically combines batteries during charging
Shares the charge between two batteries more efficiently than a battery isolator
Customers say
Customers find the add-a-battery kit works well and is easy to install, with clear instructions included. The product effectively keeps both batteries charged and is designed for marine use, making it a must-have for boats. They appreciate its robust construction and consider it good value for money, with one customer noting it’s much cheaper than repairs from failures. Customers like the battery switchability feature, with one mentioning it eliminates the need to manually switch between batteries.
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