ThermOil® Battery De-Mister® and Battery De-Sulfater additives make running and maintaining ground support equipment easier and more cost-effective by decreasing maintenance costs and increasing the lifespan of batteries up to three times longer. Guaranteed. Thermoil Inc. manufactures and markets the products Battery De-Mister & Battery De-Sulfater. These products will increase battery life, reduce charge time, eliminate corrosion, greatly reduces water consumption, explosion, toxic fumes and will help to keep your battery working under any condition while providing a safer working environment.