On 9 May 2004 23:59:47 -0700, (mowhoong) wrote:

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.