What Kind of Battery Does a 2013 Audi S4 Take?

The 2013 Audi S4 typically uses a Group 48 (H6) AGM battery with around 70–80 Ah capacity and 720–800 CCA, meeting Audi’s OEM specs and compatible with the vehicle’s start‑stop–ready electrical system. However, you should confirm exact specs (Ah, CCA, and dimensions) against your owner’s manual, existing battery label, or a dealer/parts catalog by VIN before purchase.

Understanding the 2013 Audi S4 Battery Specification

The 2013 Audi S4, built on the B8/B8.5 platform, relies on a high‑performance 12‑volt battery to support a supercharged V6 engine, heavy electrical loads, and modern comfort and safety systems. Choosing the correct battery type is crucial not only for reliable starting, but also for the longevity of the vehicle’s electronics and proper integration with the car’s energy management system.

The Standard Size: Group 48 / H6

Most 2013 Audi S4 models in North America and Europe are configured for a battery in the BCI Group 48, also known as DIN/EN size H6. This is a common European‑style size used across many Audi, VW, BMW, and Mercedes models of the era.

The key characteristics of the typical 2013 S4 battery are:

• Physical size: Group 48 (H6) – approximately 12.1″ x 6.9″ x 7.5″ (306 x 175 x 190 mm)
• Voltage: 12 V automotive starting battery
• Terminal type: Standard top‑post, often recessed European‑style posts
• Polarity: Positive terminal usually on the right when terminals are closest to you (check your original battery to confirm)

These general dimensions and terminal layouts ensure that a Group 48/H6 unit fits properly in the S4’s battery tray, accepts the factory hold‑down clamp, and reaches the cables without strain.

Why AGM Is Recommended

Audi typically specifies AGM (Absorbent Glass Mat) batteries for the 2013 S4, even on cars without formal stop‑start systems. AGM batteries tolerate higher electrical loads, repeated deep discharges, and the demands of modern charging systems better than conventional flooded lead‑acid options.

Common factory‑equivalent specs for a 2013 S4 battery include:

• Type: AGM (Absorbent Glass Mat)
• Capacity: About 70–80 Ah (amp‑hours)
• Cold Cranking Amps (CCA): Roughly 720–800 CCA (varies by brand)
• Reserve Capacity (RC): Approximately 120–140 minutes, depending on model

Staying close to these values helps maintain consistent cranking performance in cold weather and supports the S4’s numerous electronic modules, from adaptive lighting to infotainment and climate control.

OEM vs Aftermarket: How to Match the Correct Battery

The original equipment (OE) battery in a 2013 Audi S4 is typically branded Varta or Moll in Europe and often carries an Audi/VW part number in other markets. When replacing it, you don’t need the exact same brand, but you do need to match form factor and performance specifications.

Typical OEM and Aftermarket Equivalents

Several widely available aftermarket batteries align with Audi’s requirements for the 2013 S4. Exact models vary by market, but the following examples illustrate what to look for:

These are common types of compatible batteries you’ll encounter:

• Group 48 / H6 AGM from premium brands (e.g., Bosch, Varta, Exide, Interstate, DieHard, OEM‑label replacements)
• Specs near 70–80 Ah with at least 700+ CCA
• “European” or “German” fitment descriptions listing Audi S4 (B8/B8.5, 2009–2016) as compatible
• Labels noting compatibility with vehicles that have advanced electrical/energy management systems

While exact model numbers differ by retailer and region, any Group 48/H6 AGM battery from a reputable brand that meets or slightly exceeds OEM CCA and Ah ratings is typically suitable, assuming physical fit and correct terminals.

How to Verify Compatibility

Because region, trim, and optional equipment can influence what was originally installed, verifying your exact battery spec avoids guesswork and potential issues.

To confirm the right battery for your particular 2013 S4, you should:

1. Check the existing battery label for size (H6/Group 48), Ah, and CCA ratings.
2. Consult the owner’s manual section on “Battery” or “Technical Data” for recommended specifications.
3. Use your VIN (Vehicle Identification Number) with an Audi dealer or reputable parts supplier for an exact match.
4. Confirm terminal location and style visually before purchase.

Following these steps ensures you match both the physical constraints of the battery compartment and the requirements of the S4’s electrical system, preventing misfit or under‑spec batteries.

Coding and Registration: Why It Can Matter

Many modern Audis, including the 2013 S4, incorporate a battery energy management system that monitors charge state and adjusts alternator output and load shedding. While earlier cars allowed simple “drop‑in” replacements, newer models often benefit from—or require—battery registration or coding when a new unit is installed.

Battery Registration for the 2013 S4

Depending on exact build and market, the 2013 S4 may use a control module that tracks battery age and characteristics. When the battery is replaced, professional tools (such as ODIS at a dealer or enthusiast tools like VCDS) can be used to inform the system that a new battery with specific capacity and type has been installed.

The main reasons to perform coding or registration include:

• Ensuring correct charging strategy for the new battery type and capacity.
• Avoiding over‑ or under‑charging, which can shorten battery life.
• Resetting adaptation values that assume the previous battery’s age and condition.
• Reducing the chance of warning messages or electrical quirks after installation.

While some owners report that the S4 functions without coding after replacement, best practice—especially when changing battery type, brand, or capacity—is to have the battery properly registered with the vehicle’s control module.

AGM vs Flooded Lead‑Acid: Can You Downgrade?

Owners sometimes consider cheaper, conventional flooded lead‑acid batteries instead of the recommended AGM type. In a performance‑oriented, electronics‑heavy sedan like the 2013 S4, that decision carries trade‑offs.

Why AGM Is Strongly Preferred

AGM batteries are better suited to the S4’s power demands, frequent short trips, and often heavy accessory usage. Flooded batteries can technically fit and operate the vehicle, but may not hold up as well over time.

When deciding between AGM and flooded batteries, keep the following factors in mind:

• Durability: AGM handles deep cycles and repeated heavy loads more gracefully.
• Vibration resistance: AGM construction is more robust, especially under spirited driving.
• Spill resistance: AGM is sealed and less prone to leaks, an advantage in trunk‑ or interior‑mounted batteries.
• Compatibility: AGM better matches Audi’s charging strategy and energy management calibration.

Given the S4’s value and the relatively modest price difference over the battery’s lifetime, most specialists advise staying with AGM to maintain reliability and avoid electrical anomalies.

Practical Tips for Replacing the 2013 S4 Battery

Even when you’ve identified the correct battery, attention to installation detail helps protect the car’s electronics and ensures a trouble‑free swap.

Preparation and Safety

The 2013 Audi S4’s battery is typically located in the trunk/boot under a cover, depending on market configuration. Access is straightforward but should be done carefully to prevent electrical issues.

Before starting a battery replacement on a 2013 S4, consider the following steps:

1. Record settings: Note radio presets and any custom drive or MMI settings that may reset.
2. Use memory saver (optional): Some owners connect a 12 V memory saver device to preserve module data.
3. Shut everything down: Turn off ignition, remove key, and close doors if possible to limit module wake‑ups.
4. Disconnect negative first: Remove the negative (–) cable before the positive (+) to reduce short risk.
5. Remove hold‑down: Loosen and remove the battery clamp or bracket securing the battery.
6. Lift with care: S4 batteries are heavy; maintain good posture and use both hands.
7. Install new battery: Position the new Group 48/H6 AGM in the tray, secure the hold‑down, then connect positive first, negative last.

Taking these precautions reduces the risk of sparks, short circuits, or module glitches, and improves your chances of a clean, uneventful swap.

Post‑Installation Checks

Once the new battery is installed, the vehicle may perform a series of self‑checks, and some warning lights might appear briefly until systems recalibrate.

After installing the battery in a 2013 S4, you should:

• Start the engine and confirm a stable idle and normal instrument cluster behavior.
• Check for any persistent warning lights related to battery, ABS, steering, or stability control.
• Verify operation of windows, sunroof, and MMI; some may need one‑touch reset procedures.
• If available, scan the car with a diagnostic tool to clear any low‑voltage codes.

These checks help ensure that the new battery is properly recognized by the vehicle and that no modules remain in an error state due to the power interruption.

Key Takeaways: Battery Type for a 2013 Audi S4

The essential point is that the 2013 Audi S4 is designed around a high‑spec AGM battery in Group 48/H6 size, with capacity in the 70–80 Ah range and CCA typically around 720–800. Physical fit, type (AGM), and proper integration with the car’s energy management system are more important than any single brand name.

To summarize what matters most when choosing a replacement battery for a 2013 Audi S4:

• Size: Group 48 (H6) with correct dimensions and terminal layout.
• Type: AGM strongly recommended to match factory design and charging profile.
• Specs: Around 70–80 Ah and 720–800 CCA, or equivalent/higher from a quality brand.
• Verification: Confirm via existing battery label, owner’s manual, or VIN lookup.
• Coding: Where possible, register or code the new battery to the vehicle.

Staying within these parameters ensures reliable starting, stable electrical behavior, and the best lifespan from your new battery in a 2013 Audi S4.

Summary

A 2013 Audi S4 generally takes a 12 V AGM battery in Group 48 (H6) size, with roughly 70–80 Ah capacity and 720–800 CCA. This configuration supports the car’s supercharged engine and complex electronics while fitting correctly in the battery tray. Owners should confirm exact specifications via the existing battery, owner’s manual, or VIN‑based parts lookup and, ideally, have the new battery registered to the vehicle’s energy management system to maintain optimal performance and longevity.

What size battery is in the 2013 Audi S4?

Duralast Gold Group Size 94R H7 Battery H7-DLG.

Does an Audi require a special battery?

Yes, many modern Audis need a special type of battery, typically an Absorbed Glass Mat (AGM) battery, which is more advanced than a traditional lead-acid battery. These cars also require the new battery to be electronically registered to the car’s computer, as the vehicle’s charging system needs to be informed about the new battery’s specifications to function correctly and prevent damage. 
This video explains the benefits of AGM batteries for Audi vehicles: 49sChampagne S3YouTube · Apr 11, 2024
Why a special battery and process are needed 
This video explains why you need to register the battery on new Audis: 57sYOUCANICYouTube · Feb 5, 2024

• Increased electrical demand: Many Audis have sophisticated electrical systems, including start-stop technology, that require a high-performance, durable battery like an AGM. 
• Performance and longevity: AGM batteries are sealed, maintenance-free, and provide better cold-weather starting, a lower discharge rate, and can handle deep cycle charging better than traditional batteries. 
• Computer integration: European cars, including Audis, use a system that requires the new battery to be “registered” or “coded” to the vehicle’s computer (ECU). 
• Preventing damage: Without proper registration, the car’s alternator won’t charge the new battery correctly. It might overcharge it, reducing the new battery’s life and potentially causing other electrical issues. 

What you need to know

• Identify the correct battery: It’s crucial to get the right physical size, capacity (Amp-hours), and Cold Cranking Amps (CCA) for your specific Audi model. Many parts websites will allow you to search by your vehicle’s make and model to ensure compatibility. 
• Ensure proper registration: The new battery must be registered using a diagnostic tool like an OBD11 or VCDS. This process involves inputting the new battery’s details (e.g., manufacturer, serial number, capacity) into the car’s computer. 
• Consider professional help: While DIY replacement is possible, professional installation can ensure the correct battery type is chosen and properly registered, which is often recommended by Audi dealerships and specialists. 

This video demonstrates how to replace and register an Audi battery: 51sHayden SchreierYouTube · Sep 5, 2025

What battery do I need for my Audi?

Your owner’s manual should tell you what Audi battery you need – or you can check it instantly by using our battery search tool at the top of this page. Our battery test technicians can also advise you. Whatever the answer, we’re likely to have you covered.

How much is a battery for an Audi S4?

What is the Cost of a Car Battery for a Audi S4? Car batteries for a Audi S4 have a price range of $310 to $581.