This is the output of the test rig displayed on my ancient laptop. What you are looking for is the voltage curve that goes from the upper left of the screen to the lower right. Notice how when the system reaches full throttle and holds for 5 seconds at the end of the curve, it continues to loose voltage. This is taking place while pulling about 65 amps (ave).
This is not like the NiMh I have used in the past as the same tests show that the voltage stays constant once max power is reached. In other words the curve stays flat for at least the time I tested it.
Not sure what will happen if I hold full throttle for 30 seconds and I do plan on doing that some day when I get time and can do it out of doors. Running this thing in the basement is kind of scary so I only hold full throttle long enough to get a trend curve.
A 2S2P pack of the same cells run at 90 amps with a different motor/prop/controller showed exactly the same characteristics but in that case each cell would be under only 45 amp load due to the parallel circuit.
What does this mean, not too much if the cells are doing well in your application but if you are looking for a very high current for a long period, these cells may not be the best choice unless you parallel enough of them to keep the current down per cell. I will still run them in competition at the NATS this year because of the pluses that they give. Very fast charge rate and low danger of flaming out on you. Also I do not plan on running them much more than 20 seconds under full load and they seem to do fairly well in flight tests, the sag is noticeable but it is at the end of the climb so not too harmful.
More testing some day.