I thought that this would work well to refurbish an old Craftsman 19.2 v battery. It worked as described. You need to follow the directions carefully. Take numerous pictures of the old battery as you take it apart. I would not do this again. I prefer to recycle when I can, but it was a lot of work to disassemble the old battery and reassemble it with the cells. Fortunately, I had another battery that I could remove the cover and use as a guide to reassemble the new one. The cost of these replacement cells is not much less than new 19.2v NiCd batteries. I don't know if the work to rebuild the old battery justifies the savings.
Excellent product. Very good instructions. Be certain to read and follow the instructions carefully. Allowed me to restore a dead rechargeable battery for a Harbor Freight 19.2v impact wrench. This battery does seem to have more power than than the original. I would definitely use this product again. Thank you.