Here are the FMA answers to my questions:
Dear Mark,
To answer your questions:
What does 20C / 90% mean? 20C = 20 times the rated capacity. If you are discharging at 20C, you will have 90% of the rated capacity.
What is the "peak" discharge rate of this battery if 42 amps is the "continuous" discharge rate? Not rated.
Can this battery sustain a discharge of a higher amperage for short periods of time without being damaged? (I have an electric powered glider that will draw about 54 amps with this battery unless I prop it down. Typical power on cycle is about 30 to 45 seconds.) No, the maximum continuous discharge is as stated.
Sincerely,
Howard G. Matos
Technical Support
3016684280
FMA Direct, Inc.
5716A Industry Lane
Frederick, MD 21704
