Warn Dual Battery Solenoid Relay 77977

Lets you use two batteries, but saves the main battery for essential functions, such as startinEngineered Specifically To Give Maximum Power During Winch Power-In OperationFor Use With 12 Volt Accessories Such As Winches, Lights, Stereos And MoreOptional Manual Override Forces A Parallel Connection When You Need Extra Power For Charging ADesigned For Use With 12 Volt DC Magneto Or Alternator Charging SystemsEasy To InstallLimited 90 Day Warranty