For Sale - This is a PCB which will allow you to source your own components for and build a very effective 12 or 24V desulfator device as designed by Mark (tucsonshooter on the Tapatalk 'Lead Acid Battery Desulfation' forum).
I have sold these previously but personal circumstances have prevented this in recent years.
Full instructions will be provided by EM to all purchasers.
Please feel free to ask questions.