Jinx, I'm not talking death due to sulphation
here (something which apparently takes *time* to
occur as opposed to a Lead-Acid cell simply being
discharged overnight) but rather the re-charge
charactertistics of a standard Lead-Acid cell/battery.

You will find that the cell impedance goes UP on a
dead lead-acid cell - THAT's my point.

It's a matter of 'range and domain' as far as what I'm
discussing here Jinx - I'm not addressing sulphation
or gel-cells but rather the re-charge characteristics
of Lead-Acid cell ...

Jim

----- Original Message -----
From: "Jinx" <joecolquitt@CLEAR.NET.NZ>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Saturday, June 01, 2002 9:12 PM
Subject: Re: [EE]: Laptop battery fading


> >    "Aren't dead Pb batteries dead forever ?"
> >
> > Lead-Acid batteries or gel-cells?
>
> > Lead-Acids, when dead, don't conduct and then something
> > in excess of the 'normal' is required to begin the process
> > of getting something back into 'the water' ... I've seen
> > this more than just a few times in my life, and, no, it's
> > not good for the battery ...
>
> http://www.uuhome.de/william.darden/carfaq.htm
>
> Take a look at Section 16 - "How can I revive a sulphated
> battery ?". I'd say it would be impossible to do this with a
> gel cell
>
> btw, when in town the other day I picked up gel cells at
> an alarm supplier (Intek in Normanby Rd for anyone in
> Auckland - used to be Alexander Batteries then Newsec)
> for 1/4 the price of the local retailer (DSE). If I had a $64
> battery I'd probably try to revive it somehow. A $16 battery ?
> Nah, bin it (properly of course)
>

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