The battery in one of my cars had gotten deeply discharged and wouldn’t hold a charge to save its life. I’d charge it up, put the battery back in the car, and the starter would only make a little snick as I turned the key. Holy worn out battery, Batman.
I picked up a battery desulfator from Northern Tool. A great idea, I thought. However, this “smart” charger did a little too much thinking of its own. When I hooked it up it registered less than three volts in the battery and thus would not begin charging. What to do?
An experiment, that’s what. I hooked up my old-school “dumb” charger, set to the low 2 amp setting, and let it feed the battery for a couple of days. Then I switched to the desulfator. Every other day for ten days I switched between the two. Today the “desulfated” indicator light on the smart charger was no longer lit up. Progress. I popped the battery back in the car and it started on the first try. The crank was nice and strong, too, not weak at all.
I’m pleased. Now I have three other batteries to attempt to recover.
