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. Use the series harness (#3063) to combine battery voltage and unlock the 50+mph speed potential of your model. Choose 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 |
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