Jack Rickard discusses the A123 module he ordered from China in this week's video starting at 24' 25"http://www.evtv.me/vidarch.html
I just finished watching the segment. Thanks for the link SilentFlight. For anyone interested, and for anyone who don't have the time to watch and still would like to know. After some testing, Mr Rickard is not too impressed by the 28S3P he got. First he was not pleased with the shipping and Paypal fees he paid which he said were more than the pack itself. Well a reason for this might be, like some think in this thread, that he was not successful negotiating with the vendor. I can't remember if it was said in here that the modules were new, the one he got definitely was not from what he reported. His opinion on the physical aspect of the pack is that it's over engineered and under built. The pack is very compact and very light compared to other alternatives to have the same kind of power. He reported the pack weighing 106 pounds. No words on exact dimensions.
When trying to do his "bottom balancing" technique, two cells were lower than the others. He managed to bring the voltage up on one but the second one went dead.
He tried to take the pack apart, probably to see if he could replace the dead cell. The straps that hold all the cells, heat sinks and end caps together are Stainless Steel which are spot welded, easy to take apart but difficult to put back on, the bus bars are welded to the cell tabs and DO NOT take solder, he wasn't able to TIG weld either to the bus bars.
He came to the conclusion that once a cell goes bad, the whole pack is trash since he feels it is not easily serviceable. For now his conclusion is that he doesn't want to keep tinkering with the pack and he doesn't wish to get a second one.
Not my opinions here, just reporting Mr. Rickard's view from what I can remember from the video. I found it interesting to watch as it answered a couple questions asked in here about the modules.