Just reading from the towerhobbies description it does not say your charger can charge A123. I'm pretty sure that it can NOT do A123 cells.
This is a good deal on the hypersonic charger (I assume it is what you are talking about
:)
http://www.rc-monster.com/forum/show...249#post157249
But yeah, it only charges 1-3 cells. But he is selling it for a very decent price that you could probably resell it for the same if you decide it is not right for you.
Your other option is to get a hyperion charger. look at this site, and you can see all the differences of the hyperion chargers:
http://www.rcgroups.com/forums/showthread.php?t=773058
and download the excel spreadsheet and it tells you all the differences.
also read through these posts and do a search here for charger.:
http://www.rc-monster.com/forum/show...080#post156080