Alec Cameron wrote in a message to BILL BAUER:
 BB> I am also going to look at some equipment that I have run into which
 BB> purports to treat sulfated car batteries by high voltage pulse
 BB> technology.
 AC> That works on some faulty nicads of the common sizes [AAA thru 
 AC> D, and camera/ phone/ cordless tool types] but the pulse needs 
 AC> to be less than 12v per cell, and really momentary. 
I've never heard of that voltage restriction before,  and have encountered 
various messages where people were saying that they were using somewhat 
higher voltages,  30-40v being a common figure.
 AC> Leave it on for some seconds and the casing may fail. Bang! 
The usual method seems to be to charge a capacitor and then discharge it 
rapidly through the faulty cell.
 AC> Sulfation in an acid battery though is no small patch, it is 
 AC> widespread and the stuff has to be converted back to acid and 
 AC> lead and this requires time and energy. Pulses, are very short 
 AC> on time and energy!
I've always felt that a long slow charge was about the best way to deal with 
it.
--- 
---------------