Has anyone considered using the lead composite batteries made by Firefly Energy? What would be the tradeoffs?

"What would be the tradeoffs?"

Umm...their non-existence?

I can't find the link just now but I believe Firefly recently did a press release saying that Firefly lead acid batteries will be available in 2008 in group 31 truck battery format.

As Alan Drake would say, and I really can't resist this one:

Best hopes for 2008

Carbon - Coventry UK