Have a look at this site. Lots of good info on true A123 cells in the FAQ. I bought 2 2300 A123 battery's and the FMA charger that lets me balance charge right thru the charge jacks for my 88" EF Yak. Good guys to deal with.
http://www.hangtimes.com/index.html
http://www.hangtimes.com/a123_batter...iants_faq.html