A R S Car Care Tip of the Week Battery Service Battery problems are the most common reason for roadside-assistance calls. Once the engine is running, the battery stores and stabilizes the current that allows the electrical system to operate and to power the lights, the radio and other electrical components.
Batteries come in several styles.
Old-style batteries have removable caps covering the battery cells. Periodically the cells on these must be checked, and if necessary, distilled water must be added. Most new batteries have a sealed casing and are marketed as maintenance-free. Some have a small window with an indicator that shows how much charge remains. Despite their name, even maintenance-free batteries require minimal care.