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Re: ATM Battery Renewal
Jim and Sue Sapp wrote:
>
> Hi Folks,
> Are there any battery gurus out there? Maybe some of you amateur radio
> guys can answer this:
> In the dim reaches of my fading memory, back when all things electrical
> were a hobby, instead of a narrow digital field a profession, I had a little
> electronics project book that had a circuit called a "zapper" that was
> intended to renew old NiCad batteries. If I remember the text correctly, as
> NiCads age they lose their ability to recharge due to some hairy stuff that
> grows inside them and shorts them out. This zapper circuit would supposedly
> apply a large voltage (or current?) to them and "zap" the hairy stuff away.
> Does this ring a bell to anyone? I'd like to/need to have that knowledge
> again. - Which brings me to my second question:
> I have a 12v gel-cell that seems to have a couple of shorted cells. It
> won't take more than about 9 volts of charge anymore. This is one of the
> three portable power sources I use to feed my inefficient and power hungry
> telescopes in the feild, and would like to renew it somehow without coughing
> up the coin to buy a new battery. Do any of you guys know of a way to "zap"
> a gel-cell back to health?
Hi:
This URL has a nicad zapper kit for $18
http://www.gatewayelex.com/
kit-137
As far as the gel cell goes, if its bad get rid of it and get another
they do strange things when old, BG Micro has some at reasonable prices.
http://www.bgmicro.com/
--
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Brian Middle of the Pacific,
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