Combo: 3 Pcs Tenergy 3.7V 160mAh 15C LiPo Batteries for Micro Helicopters E-flite MSR /SR/ BMCX Used mainly with E-flite MSR /SR helicopter and with E-flite 4-SITE bi-plane and even better with ParkZone Sukhoi 26M 3D plane. Will give more PUNCH and ROBUST performance due to its higher current output and power. Dimensions: 44x12x6mm Direct replacement, No modification needed! Single cell Li-Polymer 160mAh battery