a method and apparatus for removing the sulfation from the plates of the battery and driving the sulfate crystals back into the electrolyte solution without overheating the battery is presented . the present invention includes a rotary magnetic hub and coil assembly to produces a unique output not found in other charging systems on the market . the battery desulfation method and apparatus of the present invention is self - adjusting to the battery , regardless of voltage and works by removing the sulfate crystals from the plates of lead acid batteries . as a result , the normal life of the average battery may be greatly extended . heavily sulfated batteries may be brought back to working condition . when used for short durations for healthy batteries , the present invention keeps the sulfate crystals off the plates and in solution to extend the working life of the battery .