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Originally Posted by svxcess
So maybe my voltmeter is in need if calibration. I removed it from the cigarette lighter and am not going to worry about it. As I said, I have no warning symptoms or abnormalities at all.
Its like a faulty bathroom scale which weighs 5 pounds more than it needs to. Focusing solely on the numbers is very frustrating.
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You have confirmed my suspicions and are doing the correct thing. However use the voltmeter to again check directly off the battery and again at the lighter socket and make a comparison. The lighter circuit could be faulty and not the meter. It is common for the socket, which gets hot, to become badly corroded.
If you can get your hands on a brand new six volt lantern battery this could provide a check. If anything slightly more than 6 V. should register. Also check the meter against one known to be accurate. Silly to just dump it.