Spektrum SPMX3002S50 7.4V 2S 300mAh 50C LiPo w/JST-RCY ConnectorThis Spektrum 7.4V 2S 50C LiPo battery w/JST connector is designed to work with E-flite UMX airplanes that require a 2S battery. The package includes one LiPo battery pack.