Rugged Ridge 70-90 Jeep CJ / Jeep Wrangler Dual Battery TrayOutfitting a trail rig can add greater strain to the electrical system. Adding on a Winch, air compressor, fog lights, driving lights, a spotlight, electric fuel pump, and a stereo amp can really tax the battery. A great way to combat that strain is to install dual batteries. This is especially true when using a Winch, which can draw big amps for an extended period. These kits are designed to mount two batteries in place of the factory single battery