The Audi battery warning light may illuminate while driving or when the car is turned on. If the battery warning light (a light shaped like a battery symbol) on the dashboard illuminates while you’re driving, it implies the charging mechanism isn’t working, although the problem might be with anything other than the battery.

A loose or corroded battery cable or other wire connecting charging system components might be the source of the battery light, or it could be an issue with the alternator or voltage regulator. The alternator is responsible for generating the electricity that is stored in the battery. If the alternator fails or the auxiliary belt that powers the alternator [...]