I have a 3.5 year old Duracell (East Penn sold by Batteries Plus) battery in my 2012 Mazda. It's the 2-year free replacement version so not the top of the line. A few months ago the engine started cranking more slowly. I tested the battery and the resting voltage was around 12.3 with the voltage dropping to about 9.0 when cranking the engine. I figured it was time to replace the battery, but I started hooking up my el-cheapo Harbor Freight float charger to it at night. Before too long the resting voltage was fluctuating between 12.4 and 12.6 and the cranking voltage was staying above 10. Then, I bought a Battery Tender charger/desulfator after reading about what desulfators do. I hook it up to my battery only on the weekend while the car is in the garage and now the voltage levels seem to remain similar to a new battery's.
Has anyone actually realized the huge gains in battery life claimed as a result of using a desulfator? This is an experiment for me. I have no real problem buying a new battery if needed, but I am finding the restored performance quite satisfying.
Has anyone actually realized the huge gains in battery life claimed as a result of using a desulfator? This is an experiment for me. I have no real problem buying a new battery if needed, but I am finding the restored performance quite satisfying.