The Rugged Ridge dual battery relay kit lets you manage two batteries without draining the spare. The kit includes a relay, a three-position switch, and wiring so you can run both batteries together or isolate one for charging. It’s a simple, cost-effective solution to keep an auxiliary battery charged and ready for accessories or recovery gear.
Rugged Ridge Dual Battery Relay 70-18 Jeep CJ / Jeep Wrangler