http://www.batterylifesaver.com Our patented, Wave² Technology makes the BLS the most effective desulfator on the market. Easy to install, the BLS will rejuvenate old batteries & extend battery life. It can double or triple the life of batteries. The BLS will work on any leadacid battery. We offer different models depending on the voltage of the battery system (from 12 to 156 volts). Only one BLS is needed per battery system.