PULSE LIPO 2250mAh 11.1V 65C- ULTRA POWER SERIES For 450-size helicopter with 3S config (T-Rex 450, Gaui X3, Forza 450...) True 5C Charge Rates -Large AWG Wiring for Maximum Power Applications Industry Standard JST/XH Balance Taps -High discharge rate for High Power Demands The choice of pro level pl and beyond, filling the flight line with pl of all skill levels&demands Myriads of Voltages, Capacities & C Ratings - Full 90 Days Warranty Period