Here is a tip I got from FMA.
1) Install the charged pack in the aircraft.
2) Set the CellPro to .25 A
3) Run the speed control to discharge the battery. Leave the charger and
12 volt power supply connected.
4) Watch the LCD or log it with the PC viewer. The PC Viewer software will
show a very nice graph of the discharge. If they wait until charge complete, the LCD only updates every 60 seconds. When charging, the LCD updates every second.
Design Engineer, FMA Inc.
First, is this a new performance problem? Did they work before?
What are the batteries? Brand, number, size?
Do you know the amp draw?
Which helicopter? Motor?
Buy a battery analyzer - CBA, Whatmeter meter, Hyperion meter, etc. Allows you to measure watts out over time.
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