E-flite 450mAh 2S 7.4V 30C LiPo 18AWG JST Battery Capable of maximum continuous discharge rates up to 30C Equipped with balancing leads and a connector that are compatible with most balancers and balancing chargers Equipped with JST connector on main power leads Perfect battery for Small indoor 3D, slowflyer, or scale airplanes using Park 180 and Park 250 motors.