Traxxas 3064 Wire Harness, Parallel Battery Choose the parallel harness to combine battery capacity for extra-long run time Proven convenience and performance of genuine Traxxas High-Current Connectors Dual-battery operation requires attention to precautions outlined in the model's owners manual Use Traxxas stock and hop-up replacement parts to get the most out of you Traxxas RTR vehicles This product is made from high quality materials and designed for lasting performance This is for use on RC vehicles, consult your user's manual for exact parts listings