Battery Life Saver BLS-36N 36v Battery System Desulfator Rejuvenator For use with 36 volt battery systems, most commonly used with 36 volt boat trolling motor batteries or Golf Carts Can extend battery life two to three times by removing and preventing the accumulation of lead sulfate crystals using patented square sine technology Rejuvenates old weak batteries. Maintains new batteries in optimal condition. Prevents slowdown. Restores power and performance to any electric motorized vehicle. From golf carts to trolling motors, you'll regain lost performance. Prevent golf cart "Slow Down", long charging times, and short usage times Built in low voltage cut-off turn the Battery Life Saver off so it won't over drain your battery.