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   The Add-A-Battery includes a Dual Circuit Plus™ Battery Switch and an Automatic Charging Relay. These components simplify switching and automate charging, so that all you have to do is turn the battery switch ON when you arrive and OFF when you leave.   Dual Circuit Plus™ Battery Switch Simplifies switching Isolates engine and house circuits Combines batteries for emergency starting Tin-plated copper studs for maximum conductivity and corrosion resistance     ACR Automatic…