The BatteryMINDer OnBoard Desulphators are designed to desulphate your batteries while you are operating your vehicle or when using a proper battery charger. The units utilize patented technology to produce a wide range of high frequency pulses known as RFP ™ (Random Frequency Pulsation) designed to dissolve both old and newly formed sulphate. RFP™ technology, sweeps the entire frequency range known to cause sulphation crystals to resonate and then safely dissolve them. Sulfuric acid, the main component in the sulphate crystals, safely returns to the battery’s electrolyte. The Specific Gravity (S.G.) of the electrolyte is now higher and able to generate more electrical energy-storage capacity than the previously sulphated batteries.*Flat Rate shipping is for the lower 48 states only.