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Old 01-04-2013, 05:56 AM
PhysicsProf PhysicsProf is offline
Senior Member
Join Date: Nov 2011
Posts: 229
Dave --
Good points.
I keep wondering if this variation in voltage across the "bad" battery 3 that you observed might have something to do with electrolysis or other chemical action INSIDE that battery. Having some chemistry background along with my physics PhD, leads me to this hypothesis -- although I can't yet check it with specific chemical reactions. I'll give this some more thought...

(Any more word on that circuit with the capacitor replacing battery 3? If the above is correct, putting a cap in place of batt 3 probably will NOT work.)

Best wishes to all -- for the benefit of mankind (rather than making a few very wealthy).