I have a set of 19.2 volt Craftsman C3 tools. They originally came with NiCd batteries, which would wear out quickly and not hold a charge. I was so frustrated with the NiCd batteries that I was ready to donate the full set of tools and replace them with something else, but that something else had to come with LITHIUM batteries. That's when Sears/Craftsman came out with C3 Lithium Ion batteries and chargers that were compatible with the C3 tools.
I had to buy new C3 lithium batteries and a new compatible charger, but I kept the same set of Craftsman C3 tools, and I am very pleased with the performance and lighter weight of the lithium ion batteries.
* Is OnlyAFew?s using NiCd batteries? They give poor performance and do not last long. They are especially poor if they have been sitting on the shelf a few years. Dust them off and they look "new" but they may have rotted in the package for too long to be useful.
* Even if OnlyAFew?s is using lithium batteries, they eventually wear out, too, even in the package. They do much better than NiCd batteries, but they will age in the package, too.
* The low cost compatible batteries from third parties that you find on auction sites like eBay are hit and miss. Sometimes they give you good quality, often not. Often they work for a short while, but die quickly. Caveat emptor!