RE-Building A123 Packs

[lincpimp]

Just use the multimeter on each cell. Most meters do not care if you reverse the polarity. So put the black probe on one end of the cell and the red one on the other end. The good cells will read higher voltage than the bad ones.'

The tabs are resistance welded on, the only ways I have found to seperate these is to slowly wiggle the cell back and forth and the tab will eventually come off. You can solder to the cells, but you have to be careful. I usually leave the tab on the cell, and just cut it off in the middle where it bridges to another cell and put the solder on the tab...