>     "Immediately the voltage starts to rise
>      you disconnect the 15V."
>
> 'splain to me how this works again - minding
> Ohm's Law?

I agree that zapping is more applicable in general - it may
take several goes but should work eventually, and this is
my preferred method. My experience with the brute force
voltage method is that you can do this with a cell that shows
0.00 or thereabouts after normal charging has been tried. It
will take several seconds to break down the dendrites. Limiting
the current available will minimise risk, but there has to be
enough to punch through that barrier. As mentioned in the other
post, this is an alternative to zapping, as very large caps
probably aren't in many people's spare parts department

Don't get the idea that I regard this as some Extreme Games
event - if you don't watch what you're doing you could come
unstuck

> - this isn't like trying to charge a dead, stone
> cold Lead-Acid cell ...

Aren't dead Pb batteries dead forever ? I've always been
led to believe that significant sulphate formation is irreversible,
and leaving Pb batteries discharged for any length of time
is unwise

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