Thank you for the help.. yes i understand what you are saying. Yeah, The Voltage now is 8.4 (4.2 per cell) and the green light indicated fully charged. Now i hook it up to the xrb and get a 2 min. flight. While the battery is under load the Esc has to be tripping the shutdown safety. This is the only thing that makes sense. The voltage has to be dropping under load. I will call the New Jersey shop which repairs the xrb and talk to him about just replacing my battery. Is this what you would conclude? At this point, i just dont think the problem is inside the heli. Thank you again for the help.