The Traxxas 2950X 4200 mAh 8.4 V 7‑Cell NiMH Battery is a high‑capacity rechargeable power pack designed for use in many Traxxas electric vehicles that accept 8.4 V NiMH packs, such as the Traxxas Slash 4X4 and Traxxas Rustler 4X4. With 4200 mAh capacity, it delivers extended run time and consistent power output, and features Traxxas’s Easy‑Connect pressure‑fit bullet terminals for secure, hassle‑free installation. Built by Traxxas for reliable performance and durability, this NiMH battery is ideal for bashing, racing, and recreational driving.