melasta 8.4V 4200mAh 7-Cell Hump NiMH Battery Pack with Traxxas Discharge Plug for RC Racing Car Parameter:Voltage: 8.4v,Capacity: 4200mAh,Battery Type: Nickel Metal Hydride (NiMH) Structure: built with 7 MELASTA Racing Cells Compatible with: popular standard 8.4V RC cars which with Traxxas Discharge Plug Standard Dimension: 140 x 46.8 x 44.5(Hump Hight)mm / 5.51 x 1.84 x 1.75 inch Warranty: 35- DAY return policy and 1 Year warranty