BATTERY WITH INVERSE VOLTAGE ?

[mowhoong]

I keep one funny battery for 20 years ago, it was a size AA, 1.5 volt.
The reason was this battery'polarity was invert when you measure,
untill to day I
don't understand why ? Can any person know what is going on. Thanks

 

[gothika]

I keep one funny battery for 20 years ago, it was a size AA, 1.5 volt.
The reason was this battery'polarity was invert when you measure,
untill to day I
don't understand why ? Can any person know what is going on. Thanks

I take it that it's a rechargable? maybe nicad?
If you let the dwell on these batteries drop to low they can reverse
polarity.

 

[John Del]

Subject: BATTERY WITH INVERSE VOLTAGE ?

From: [email protected] (mowhoong)
Date: 5/10/04 6:59 AM
Message-id: <[email protected]>

I keep one funny battery for 20 years ago, it was a size AA, 1.5 volt.
The reason was this battery'polarity was invert when you measure,
untill to day I
don't understand why ?

Likely a manufacturer screw up. I had a 9V that was reversed in that way.

John Del
Wolcott, CT

"I'm just trying to get into heaven, I'm not running for Jesus!"
Homer Simpson

(remove S for email reply)

 

[mowhoong]

I take it that it's a rechargable? maybe nicad?
If you let the dwell on these batteries drop to low they can reverse
polarity.

It was alkaline battery.

 

[Sandra]

I keep one funny battery for 20 years ago, it was a size AA, 1.5 volt.
The reason was this battery'polarity was invert when you measure,
untill to day I
don't understand why ? Can any person know what is going on. Thanks

Maybe it was in series with a bunch of other cells, and the device has
been used until no single drop came out of the batteies. This cell was
empty first. It has been charged reversely by the others that were not
completely empty.
(just a guess)

Sandra

 

[Sandra]

I keep one funny battery for 20 years ago, it was a size AA, 1.5 volt.
The reason was this battery'polarity was invert when you measure,
untill to day I
don't understand why ? Can any person know what is going on. Thanks

Maybe it was in series with a bunch of other cells, and the device has
been used until no single drop came out of the batteies. This cell was
empty first. It has been charged reversely by the others that were not
completely empty.
(just a guess)

Sandra

 

[Asimov]

"mowhoong" bravely wrote to "All" (12 May 04 08:46:06)
--- on the heady topic of "Re: BATTERY WITH INVERSE VOLTAGE ?"

mo> From: [email protected] (mowhoong)

I take it that it's a rechargable? maybe nicad?
If you let the dwell on these batteries drop to low they can reverse
polarity.

mo> It was alkaline battery.

I found a defective electrolytic which acquired a permanent voltage
and it still measured a couple of volts the last time I looked at it.
Big caps normally show a permanent voltage of a few 10's of millivolts
but this it isn't a very big cap, only 47uF & 35WV, high esr though.

Asimov
******

.... A couple of volts below threshold.