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Handbags   (The sad, the bad and the ugly. Non-productive stuff here.)

Started by: priscus (inactive)

It threw me when I first encountered it.

Took an AA alkaline battery, and put leads from digital multimeter to its terminals.

Nominally a 1.5 Volt battery, but is not new.

So, I was expecting to see reading of maybe 1.2V if the cell was OK,

and perhaps something circa 700 milliVolt if cell had expired.

What I read was MINUS 150 millivolts.

And a similar negative reading for the other cell!

Turning them round the wrong way yielded similar readings in positive territory, so at first, I thought perhaps my meter's 'polarity reverse' function was misoperating. Not so: new batteries tested OK, and tried another meter, which yielded similar results!

Replied: 7th Dec 2019 at 02:46

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