Life test measures how a battery endures repeated charge-and-discharge cycles at hot-climate engine-compartment temperatures. The more cycles endured while maintaining a higher voltage, the higher ...

Life test measures how a battery endures repeated charge-and-discharge cycles at hot-climate engine-compartment temperatures. The more cycles endured while maintaining a higher voltage, the higher ...

See reviews below to learn more or submit your own review. DieHard Batteries manufactures automotive batteries. Its product line includes batteries for cars, trucks, boats and recreational vehicles.

With high production values and plenty of suspense, this 79-second spot looks more like a George Romero flick than an ad for Diehard car batteries. While there's no shortage of zombie commercials ...