Traxxas Wire Harness, Parallel Battery - 1/16 E-Revo/Slash:Traxxas Parallel Battery Wire Harness with H/C connector for the 1/16 scale MINI VXL REVO and 1/16 scale MINI VXL SLASH. #TRA3064Only Traxxas Y-harnesses let you run dual-battery power for increased speed or runtime with the proven convenience and performance of genuine Traxxas High-Current Connectors. Use the Parallel harness (#3064) to combine battery capacity for extra-long run time.Dual-battery operation requires attention to precautions outlined in the Slash VXL 4WD manual. Follow all precautions to assure peak performance and reliability of your model and batteries. Traxxas parallel and series Y-harnesses are for use with 2/3A battery packs only.