This is the 1S LiPo Battery Charger for the 230Si Quadcopter UAV from Heli-Max. For use with the 1S 3.7V 1200mAh battery used in the 230Si Quadcopter. Selectable charge rate from 1.0 - 1.8A in .2 amp increments. Single solid LED shows charger current, single flashing LED indicates charging and all LEDs flashing indicates charge complete.