Excuse me? The Aussies have been using A123 for well on to a year now. The first mentioning was in June 2006, and now more and more featherweight teams are using them over there.

And why is it that a LiPo is allowed in a Feather and an A123 isnt? I read this line the same as Woody did, anything heavier than a feather and Lithium rechargeable is not allowed. To me that says ALL Lithium, not just LiPo in particular.

It sounds a bit funky to me that a battery that is inherently unstable would be allowed while a cell that is mechanicly way more stable isnt.