Testing your car battery is vital to ensure it is working properly. Where can you have it checked, and how often should you ...

Spark plugs have a pretty predictable life cycle, but ignition coils can be harder to track. Here's how to tell if an ...

Car batteries can stop working correctly for a variety of reasons. The solutions often depend on the age and condition of the battery. Here's what to know.

A fully charged lead-acid car battery will have an electrolyte solution of about 37% sulfuric acid and 63% water. In this state, the positive plates inside the battery turn to lead oxide, while ...