Whether you're dealing with a dead battery on a cold morning or just trying to maintain your car during long periods of no driving, knowing how to properly charge a car battery is important.

Working on car electrical systems used to be easy. The battery simply provided power for the car’s starter motor when starting or to run the small number of accessories when the engine wasn’t ...

In our lab tests, Car Batteries models like the AGM H5 are rated on multiple criteria, such as those listed below. Life: Life test measures how a battery endures repeated charge-and-discharge ...

We've tested and reviewed products since 1936. Read CR's review of the Duracell Platinum AGM 94R H7 car battery to find out ...