Well, As far as rebuilding a "smart" li-ion battery, I havent found a good way to do this.

The problem is not re-celling it, the problem is the microcontroller writes the cells condition and capacity in the eeprom of the controller. So without a way to reset all that, the battery will still think its dead/shot even with brand new cells.

it all depends on the individual controller circuity, some of them have re-learning capability, but if the battery thinks its dead and the cells are fully charged, it can explode thinking the battery is dead. I had this problem with the old thinkpad batts. New cells, the control IC registered the battery as defective so the orange light never stopped blinking. Once i got it to somewhat work right, the batts exploded because it thought they were dead. lol.