Lets you use two batteries, but saves the main battery for essential functions, such as starting the vehicle. Minimizes charging system overload; if both batteries need charging, the main battery is charged first.

Engineered Specifically To Give Maximum Power During Winch Power-In Operation
For Use With 12 Volt Accessories Such As Winches, Lights, Stereos And More
Optional Manual Override Forces A Parallel Connection When You Need Extra Power For Charging A Weak Battery Or Jump-Starting Another Vehicle
Designed For Use With 12 Volt DC Magneto Or Alternator Charging Systems
Easy To Install
Limited 90 Day Warranty