I have a couple of older Porter Cable 19.2v Ni-Cd batteries which have worn out. In shopping around for replacements, I've noticed there are a number of businesses which offer to rebuild your existing batteries with new cells.
One of the claims that some rebuild shops make is that they use high capacity cells (2400mAh) which will give longer run times compared with OEM batteries. Also, since my tools are older, replacements are a bit harder to find. The cost difference doesn't seem that significant (rebuilding seems a bit cheaper).
Can anyone give me a rundown of things to consider when deciding to rebuild the batteries as opposed to replacing them? I'd also like to avoid an experience I had about 5 years ago where I purchased a set of 2 "new" Dewalt 18V batteries from an online retailer only to find they did not perform nearly as well as the original batteries that came with the tools.