2-Pack of Lectron Pro 3.7 volt - 300mAh 35C Lipo Battery for UMX B-17G Flying Fortress, Flyzone Micro P-38 Lightning Warbird, and E-Flite Mosquito Perfect for the UMX B-17G Flying Fortress, Flyzone Micro P-38 Lightning Warbird, and E-Flite Mosquito 20% more runtime! 35C continuous discharge rate of 10.5 amps with 16 amp bursts