These dual battery kits are a full featured, very high quality kit designed for all generations of Ford Broncos and F-Series trucks. They allow for the installation of dual group 65 or Optima style batteries in place of the single battery tray. It is all inclusive with the highest quality brackets and wiring. Wrangler Power has been long known as the best in quality power management systems so you know what your getting is the best. The wiring and battery manager switch allows you to start the vehicle with only the main battery, or switch to dual battery for extra starting power should the main battery be weak. It further allows isolation of the two batteries should one be bad. Yet it also charges both batteries when the truck is running. The kit includes a dual battery tray kit, high quality 200AMP isolation relay and cable kit and battery manager switch assembly. Starting at $395.