Leon, A year ago Christmas, I purchased a batteryminder 12248. Cost over $100. Is it worth it? Hard to say. Will it bring back a battery from the dead? NO
I also recently purchased a battery conductivity tester, Midtronics Advanced Battery, Starter & Charging Tester, 300 series. It can measure the acutal cold cranking amps of the battery. Many times better than a load tester. After using the batteryminder, there isn't an increase in the cold cranking amps. The temperature of the battery has a greater influence on CCA.
SO, if the batteryminder desulfates the plates it has to be a very small amount and there is very little if any change in cca. Again, the temperature does change the cca more then batteryminder.
However, it is a good battery charger that doesn't over charge and cook the battery. Sometimes it takes weeks on a battery before it's done with the desulfating mode.
Because I spent a pant load on the batteryminder, it is always connected to a battery in the pole barn. I keep many batteries in the work bench, rotate it between tractors, mowers, mule, truck, car, trolling battery, and dump trailer.
I'm hoping the batteryminder will keep a healthy battery healthy longer. Only time will tell. I was expecting more for from batteryminder. George
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