Blue Sea Systems Add-A-Battery Kit<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Simplifies switching. Isolates engine and house circuits. Combines batteries for emergency starting</li><li>Tin-plated copper studs for maximum conductivity and corrosion resistance</li><li>12/24 Volt DC 120 Amp Automatic Charging Relay (PN 7610) automatically combines batteries during charging. Isolates batteries during engine cranking and when not charging</li><li>Includes E-series dual circuit plus battery switch (PN 5511E)</li><li>Shares the charge between two batteries more efficiently than a battery isolator</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51EBjl3WCrL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41oqjwHrsDL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/71tgeX%2BLlZS.png" noproxy>