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.