Check the listing for details. Traxxas 3064X Parallel Wire Harness Battery Connection 1/16 E-Revo Summit Slash. Condition: New. Listed at 10.99 USD. Wire harness, parallel battery connection (compatible with Traxxas® High Current Connector, NiMH only)Only 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. Choose the parallel harness to combine battery capacity for extra-long run time. Dual-battery operation requires attention to precautions outlined in the model's owners 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. Accessory part for these models:1/16 E-Revo VXL1/16 E-Revo1/16 Slash 4WD1/16 Summit VXL1/16 Summit