There are two negative pins and one positive on the Leica M8 & M9 charger. I put a meter on them and got readings I cannot understand - yet. They vacillate wildly within different voltage ranges. I've yet to apply the meter to a charged battery because the contacts are buried in plastic, but I will soon.
Before I make an utter fool of myself, does anyone have an idea regarding the roles of the negative pins? Does one read the internal chip? Why do voltages change every second?
One objective is to eventually read the internal chip to detect fake or defective batteries.
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