Milwaukee batteries

jpanhalt

Joined Jan 18, 2008
11,087
Sears Craftsman chargers had several contacts too. They served a few purposes: over temperature detection, cell/voltage detection, charging. Knowing the exact model of battery may help. A voltmeter can help, but if you have a bad pack, tearing that apart is the easiest way. That's what I did with a Sears pack a few years ago.

John
 

tcmtech

Joined Nov 4, 2013
2,867
If it's a lithium based battery it could be for cell balancing. If it's a NiCad or NiMH they could be related to temperature sensing and charge control.
 
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