Traxxas 2941X Series 3 NiMh 7Cell 8.4V 3300mAh Hump with ID Plug

Battery Dimensions: 139mm x 42mm x 48mm

"Semi rigid construction does not require a hard case and eliminates wire harness connectors that can loosen and fail. Engineered specifically to fit Traxxas models. New high current connector with gold-plated copper terminals and integrated balance connector iD Auto Battery Identification allows Traxxas iD equipped chargers to automatically set and optimize charge settings for specific battery MAXX cable high-efficiency 12 gauge silicone jacketed wire"