I am trying to rehabilitate some old Craftsman battery packs for 19.2 V and 14.4 V tools. They all contain NiCd, SubC cells. My chargers are only for NiCd. The oldest packs have almost no built-in protection. The newer ones have two devices. One is a thermal fuse/switch labeled 115°C that is taped to an outside battery. This device was stuck in the center of the pack between cells and is in the negative lead of the charging supply. It is not a diode so far as I can tell. It has a resistance of about 13 K in either direction. Diode function reads open in both directions.
As it turns out, 19.2 V packs are available after market for less than the cost of new cells, and I bought a pair. The prices for replacement 14.4V packs NiMH are about twice the cost of the 19.2 V ones. The NiCd versions of the 14.4 V packs are even more expensive.
Any ideas on what that device is?
Thanks, John
As it turns out, 19.2 V packs are available after market for less than the cost of new cells, and I bought a pair. The prices for replacement 14.4V packs NiMH are about twice the cost of the 19.2 V ones. The NiCd versions of the 14.4 V packs are even more expensive.
Any ideas on what that device is?
Thanks, John