Pulsetech PowerPulse 12-Volt Battery Maintenance System, Black Ensures peak battery performance Eliminates the main cause of lead-acid battery problems and failure, sulfation buildup on the battery plates Works on all lead-acid batteries including gel cell, antimony, hybrid, calcium plate designs and absorbed glass mat Increases battery life span up to 3 times longer than normal Been used extensively by consumers and the U.S. Military worldwide for almost 10 years