Hi - I just joined and this is my first post. I don't know if this is the right place to ask this question, but you sound pretty knowledgeable, so here it goes. If I am in the wrong place, please redirect me. I have several 19.2 Craftsman cordless batteries which, when I put them on the charger, light up the green light which signifies a defective battery, or that the battery is fully charged. They are not charged, however. All read aywhere from a couple of volts to 17 or 18 volts and one or two can be "rejuvenated" from another battery and will work very weakly for a minute or so but will not take a charge in the charger. I believe that several of these batteries have been overheated, either by bad chargers or by reversing the contacts. I don't know about all of them but this seems to be what is behind this. Is there any way to repair these batteries aside from replacing all the cells? Many of the cells read 1.2 when tested but that is without a load. I haven't tested any yet with a load - such as a flashlight bulb with pigtails soldered on. I just fixed a couple of batteries by replacing the ceramic "thermistor" I believe it is called and now they work fine. When I put those on the charger before replacing the thermistor, they just showed as dead or as one side dead and they would not take a charge either. As I said, they are fine now. Am I missing something or are these batteries just good for parts and/or junk? Thanks very much for your help. Allen