To me what's very interesting is figuring out how many it would take to power a full size car. A compact car using 20 Trojan T105 6v batteries(series/parallel-120volts,128amphr) will go apprx. 60-90 miles on a charge.They would weigh over 1200 lbs. It would take 2400 A123 cells(2300mah) wired series/parallel to give you 138amp/hr @ 132 volts. The pack would weigh 450-500 lbs. The limiting factor is cost-you would have to be able to get the A123 cells @ $1 ea. or less and then find someone to help build the pack and the charge/management system. The trojans are $200 apiece. Don

They wouldn't be good at all in the cold climates. Lithium batts don't perform well in the cold.

I didn't know that-it shouldn't be all that hard to put them in a warmed insulated box. Lead acids do even worse. I wonder what Chevy is doing to combat that on the Volt? Lead acids do even worse. Don

Look what I found. I was looking at some electric bikes and holy crap wtf!?!!

Now they didn't just use the a123 pack to start the car. The car would not start. The guy attached a 4s1p a123 2300mah pack to the battery like a jumper battery thing. It works like a charm.

http://www.youtube.com/watch?v=qcvmvrmTMMk