Jim Adney wrote:

If you want to reverse sulfation, you just have to set the voltage at
about 2.35 V per cell and wait for the ions to come back into
solution. If you're patient, it usually works.


Sorry for the dumb question, but how many cells are in a 12 volt car
battery? Must be six at around 2 volts each. If this is right, then
your advice is to set the charge voltage at 14.1 volts. If I recall
right, the car's charging system runs at 13.8 volts so the 14.1 is right
in that ballpark.

I rather regularly recover sulfated batterys and it generally takes
about a week. I had one which took 2.


There is all manner of hubbub about pulsed desulfators, etc. For the
average person, taking a week or two with off the shelf equipment is
much desired over special desulfators.