Racers Edge PRIME offers a new line of race spec batteries designed for top-level competition. The Racers Edge PRIME 4000mAh 75c 7.4 volt (2s) standard length LiPo battery offers unmatched performance and true constant current ratings that provides the user a versatile full-length lightweight battery. The 4000ST 75c pack offers a 23mm low profile case design that lowers the center of gravity and improved punch vs. run time that still has more than enough run time for some of the most demanding boosted and modified applications. As a crucial added benefit to the design this battery is 91grams lighter than our 6000 75c pack that by reducing the total weight of the chassis significantly improves acceleration and reduces tire wear. The RCELP2S4000ST75C battery is hard cased, with bullet connectors and includes a bullet to Deans plug power lead. All Racers 4s Lipo Pack 5200 75c Edge PRIME batteries are R.O.A.R. Approved.