I don't actually have much experience with these batteries to determine life but I was very pleased to find thses so i can contninue using all those black and decker tools that had become oblolete for lack of finding replacement batteries. And, they are NiMH which I hope will be better than the old NiCads. Not a bad price either and the quality appears to be quite good. I didn't have a problem inserting these into the tools as some have reported.
Ni-Mh 19.2V 3.6Ah Replacement Battery For Craftsman Diehard C3 130279005, 130279003, 315.113753, 315.115410, 315.11485 1323903 1323517 11375 11376 Cordless Power Tools
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