An AGM battery should not affect radio operation, so check connections and perform a hard reset. A "miracle" car spray promising six months without washing is unlikely to work on heavy dirt. A faulty ...

You don’t want to wait until the day your car doesn’t start to begin researching replacement car batteries. Eventually, your car’s battery will run out of charge and needing a replacement is part of ...

How well a battery withstands repeated charge-discharge cycles in high temperatures. A higher score means better reliability and voltage retention over time. How long a battery can power a car if the ...

Every battery needs a 12-volt car battery, even that newfangled electric car you're driving around. 12-volt car batteries continue to be the biggest part of the $100-billion auto battery market, and ...

The DieHard H8-AGM is part of the Car Batteries test program at Consumer Reports. In our lab tests, Car Batteries models like the H8-AGM are rated on multiple criteria, such as those listed below.