I have a really nice Milwaukee 18v cordless tool set. The batteries are 48-11-2230 NiCd. The batteries are dead. All I need are the battery "guts." I've removed them from the cases. But, it appears from my looking around that there are no clear batteries to buy. Most of the reviews tend to say the replacement batteries will not hold a charge, and the prices vary widely. I certainly do not want to buy a whole new set of cordless tools. This set rocks! Anyone have any experience buying replacement batteries to put in the original casings?