Bias 8.4V 3000mAh NiMH Battery Hump - UNI Plug (EC3/Deans/Traxxas/Tamiya) for RC Car, Truck, Buggy, Boat, Quadcopter, Heli, and Drone x2 Packs Battery Type: Nickel Metal Hydride (NiMH) Battery Capacity: 3000mAh Volts: 8.4V Plug Type: Venom UNI Plug. Compatible with Traxxas Plug, Tamiya Plug, Deans Plug & EC3 Plug.