[BrianG]

224A is a lot, but what the heck would need that kind of power? 224A at 18 cells would be over 4,800 watts! No single cell I know of can deliver that kind of current and maintain voltage over 1v. And sure, you can parallel them, but then weight would start to climb fast. A parallel bank of 18 cells would be over 5lbs! (assuming 65g each). Personally, I'd rather take a ~150A controller capable of 6s+ and use higher voltage with a matching motor to make the power I need.

Of course, you boat guys need that kind of current. I'm talking land vehicles. :)