Alan, Their website also quotes:

# 70A continuous discharge
# 120A, 10 sec pulse discharge

70A being 30.5C but I was basing it on the 2Ah capacity hence 35C. Either way it remains far from what is possible in a pack in realistic conditions.

I have just found out some of my results and at 26 to 27A will not quite last 270 seconds and ended up being just under 60 Deg C. 20C lasted about 180 seconds and 68 Deg C. Now put them inside a robot with a number of packs bunched together, with hot motors and then inside an outdoors arena and you would have to derate the packs accordingly.

One interesting point about the A123s under a 20C discharge is that their internal resistance initially rises but then falls as their temperature rises. Just before the cells collapse, they are delivering their max current.

A Bot-Pack at 30A will last just about 300 seconds.