2020 Jeep Wrangler JL Dual Battery Kit: Diesel 392

Gen 3 Dual Battery System for Jeep Wrangler JL Diesel/392. Features a smart battery combiner (300A continuous, 2000A peak) that charges the cranking battery first, then links both. Separates batteries when voltage drops to protect cranking battery. Includes positive and negative bus bars with various stud sizes (3/8", 5/16", 1/4") and #10 screws for accessories, a Boost Switch (Auto, On, Off modes), and a G Screen Port for optional monitoring. Cables are 2ga heavy-duty, high-strand count, pure copper welding cable with tin-plated, adhesive-lined lugs. Tray is CNC laser-cut, powder-coated steel. Requires Group 25 batteries (sold separately, factory battery incompatible).