4-Pack of Turnigy nano-tech 160mah 1S 25~40C Lipo Pack (Kyosho, E-flite, Parkzone Etc Works with, Blade mCX, mCX2, mSR, mSR X, Nano QX, Nano CPX, and UMX AS3Xtra ParkZone Vapor, Micro Citabria, Cessna 210, Ember, and the Parkzone Sukhoi Longer flight times than stock battery Discharge: 25C Constant / 40C Burst Hobbyzone Duet