2pcs Upgraded Turnigy Nano-Tech 600mah 1S 35-70C Lipo Pack Nine Eagles Solo Pro 328, Eflite MQX, Blade 120SR, Smya X1, Hobby Zone Champ JST Connector Discharge 35C Constant / 70C Burst Fits the Blade 120 SR, 180 QX, mQX, UDI U818A, and Syma X1 15.8 Grams Long lasting economical.