2 Pack of the E-Flite 150mAh 1S 3.7V 25C LiPo Battery (EFLB1501S25) 2-Pack of E-flite 3.7 volt 150mAh 25C Lipos for Blade mCX mCX2 mSR mSR X Nano QX Nano CPX UMX AS3Xtra Connector Type: 					Ultra Micro