Batteryminder
 

How effective is the BatteryMinder relative to extending battery life?

The Battery Minder is a very effective product for both storage and desulfating batteries. It consists of a low amp charger for battery storage and supplies the battery plates with pulsating waves to eliminate sulfation. Sulfation buildup on lead plates prevents the batteries from receiving the ultimate charging function from your battery charger, thus the loss of life of your batteries in a shorter time then what they were designed for.