Germany · Battery knowledge hub
Audi models commonly use AGM or EFB batteries with an energy-management system that tracks battery condition. Battery location varies widely — engine bay, boot or under a cover — and registration (often called battery adaptation) is part of a proper replacement.
Select a model for generation-level battery notes
Energy management can switch off comfort features to protect starting capability when the battery is weak — a common early symptom.
Electrolyte is held in glass-fibre mats between the plates. AGM batteries tolerate frequent deep cycling and high electrical loads, which is why they are fitted to many premium and start-stop vehicles with brake-energy recovery.
Replacement rule: A vehicle designed for AGM should be fitted with AGM. A flooded or EFB battery in its place is likely to wear out quickly and may trigger charging-system faults.
Read the AGM guide →A strengthened version of the conventional flooded battery with improved cycling durability. EFB is commonly specified for entry-level start-stop systems that do not need the full capability of AGM.
Replacement rule: EFB can often replace a conventional battery, and AGM can often replace EFB — but EFB should not replace AGM. The vehicle may also need to be told which type is fitted.
Read the EFB guide →Generation-level information from our vehicle database. Where a field says “confirm”, it varies by engine or trim and is checked against your vehicle.
Audi’s energy management stores battery data. Adapting the new battery keeps charging and load management accurate.
Messages about switching off consumers often point to battery state, not a fault elsewhere.
The energy-management system thinks battery charge is low. A battery and charging test identifies whether the battery is failing.
Tell us the model and year, and send a photo of the current battery if you can. We confirm the right battery before anyone sets off.
Daily, including late evenings. Out-of-hours requests are answered as technician availability allows.