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The Add-A-Battery is as simple to operate as an On-Off switch, yet effectively manages the switching and charging of two batteries from a single charge source.


  • Simplifies switching. Isolates engine and house circuits. Combines batteries for emergency starting
  • Tin-plated copper studs for maximum conductivity and corrosion resistance
  • 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
  • Includes E-series dual circuit plus battery switch (PN 5511E)
  • Shares the charge between two batteries more efficiently than a battery isolator


  • Brand: Blue Sea Systems
  • Style: 120A DC
  • Item Dimensions: 6 x 5 x 4 inches
  • Item Weight: 2 pounds
  • Actuator Type: Rotary
  • Material: Copper
  • Operating Voltage: 24 Volts
Weight 1 lbs