Any claims of lasting longer are based on selective data, as a marketing gimmick (i.e. selecting the best of one and worst of the other) and is misleading. Battery life, like anything else, cannot be precisely pre-determined, any more than the life of your car or humans. The actual life out in the field, when operated under identical conditions, is the only valid criteria. One way to differentiate the life and performance is to look at the amount of materials, and the type of materials used in making the product. U.S. Battery Manufacturing Company uses more of the life and capacity giving active material than our competitors. Plus the unique grid alloy, and state-of-the-art processing technology, gives you the best possible life and performance.