[Milsurplus] NiCad battery question -Stoddart NM25T USMC

[Glenn Little WB4UIV]

When NiCads were hard to find at an affordable price, I did this to 
many NiCads.

The NiCad is made by rolling the electrodes with a separator between 
the plates.

The whiskers puncture the separator.

When you clear the whiskers, that have penetrated the separator, you 
increase the diameter of the penetration hole.

This leaves a very easy point for the cell to reshort.

The battery will operate for a while, but, in time, will fail again 
in the same mode.

I would look into getting a replacement battery as this on will most 
probably be short lived.

YMMV

73
Glenn
WB4UIV



At 12:03 AM 5/30/2009, John Hutchins wrote:
>Howdy There boys and Girls -
>
>There were 3 shorted NiCad cells.  Like to thank the group again for
>there most expert advice.  Hooked each battery up to the 12V car
>battery, quickly swiped a lead across the negative electrode while
>pressing the positive  electrode to the + on the car battery; Vo- La
>NiCad whiskers are GONE!.  Battery pack charged up to a tad > 17 Volts
>on 12 NiCad batteries connected in series.  NM25T is working just fine.
>
>Thanks
>Hutch
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