EverStart batteries are made by the same company (Johnson Controls) that makes some of the premium brands (DieHard and Interstate, for example), and is the same company that made Costco's Kirkland line. Like the DieHard, the EverStart MAXX-35N carries a three-year warranty, with free replacement if it fails to hold a charge during that time. In addition, the maker also offers a two-year prorated warranty after the initial three years are up. A few owners say they did have to make a warranty claim, and Walmart replaced the batteries with no problems -- even, a couple of times, when the battery would still start the car but capacity tested low on Walmart's meter. And unlike Sears, Walmart installs batteries for free.