What Car Batteries Does Audi Use?

Audi primarily uses AGM (Absorbent Glass Mat) 12‑volt batteries from suppliers such as Varta (Clarios), Exide, and Banner, along with high‑voltage lithium‑ion batteries from partners including LG Energy Solution, CATL, Samsung SDI, and others for its plug‑in hybrid and fully electric models. The exact battery type and supplier vary by model, drivetrain (combustion, hybrid, or electric), and market region.

How Audi Chooses Its Batteries

Audi does not manufacture its own batteries; instead, it sources both 12‑volt starter batteries and high‑voltage traction batteries from major global battery manufacturers. The company specifies performance, size, chemistry, and durability targets, and then works with suppliers to develop battery systems that integrate with Audi’s electrical and thermal management architectures.

12‑Volt Batteries in Audi Vehicles

All Audi vehicles, including EVs, use a 12‑volt battery to power onboard electronics, control units, lighting, and safety systems. The chemistry and design depend on whether the car has conventional stop‑start tech, mild‑hybrid systems, or an EV architecture.

Main 12‑Volt Battery Types

The following list outlines the main types of 12‑volt batteries commonly found in Audi models and where they are typically used.

• AGM (Absorbent Glass Mat) batteries – The most common in modern Audis with start‑stop systems; they handle frequent charge/discharge cycles and high electrical loads. Many Audi A4, A6, Q5, Q7, and similar models use AGM batteries.
• Enhanced Flooded Batteries (EFB) – Sometimes used in lower‑demand models or markets with fewer electrical options; they are more robust than traditional flooded lead‑acid but cheaper than AGM.
• Conventional flooded lead‑acid – Less common in recent premium Audi models but may appear in basic trims or older vehicles without start‑stop.
• 12‑volt lithium‑ion (auxiliary) – In some newer EVs and high‑end models, Audi is progressively moving toward 12‑volt lithium‑ion units to reduce weight and improve longevity, though lead‑acid remains widespread.

In practice, most current combustion and hybrid Audi models in Europe and North America rely on AGM batteries, with EFB and conventional flooded batteries fading out as electrical loads rise and emissions regulations demand more robust start‑stop operation.

Key 12‑Volt Battery Suppliers

Audi sources 12‑volt batteries from long‑standing European and global manufacturers, depending on the plant and region.

• Varta / Clarios – One of the most visible brands in OEM Audi batteries in Europe; many factory‑fitted AGM batteries in Audi models are Varta‑branded.
• Exide – Supplies lead‑acid and AGM batteries to multiple VW Group brands, including Audi, especially in European plants.
• Banner – An Austrian supplier used widely by Volkswagen Group; Banner-branded AGM and EFB batteries are found in many older and some current Audis.
• Bosch and other regional suppliers – In some markets, Bosch and local partners supply equivalent AGM/EFB batteries that meet Audi’s specifications.

While owners may see different brand labels—Varta, Banner, Exide—the critical point is that these are OEM‑grade units built to Audi’s specifications for capacity, cold‑cranking performance, and integration with the car’s battery management system.

Batteries in Mild‑Hybrid (MHEV) Audi Models

Audi’s mild‑hybrid systems (often 12‑volt or 48‑volt) add another layer to the battery story, especially in newer A6, A7, A8, Q7, Q8, and select A4 and A5 models.

The following list explains how batteries are configured in typical mild‑hybrid Audi models.

• 12‑volt AGM starter battery – Continues to power conventional electronics and supports start‑stop functionality.
• 48‑volt lithium‑ion battery (for MHEV system) – A small but powerful lithium‑ion pack, usually mounted in the rear of the vehicle, that works with a belt‑driven starter‑generator to recuperate energy and assist the engine.
• Integrated power electronics – DC‑DC converters link the 48‑volt and 12‑volt systems, ensuring stable supply for infotainment, lighting, and safety systems even when the engine is off.

These mild‑hybrid setups reduce fuel consumption and emissions while putting greater demands on the 12‑volt battery, reinforcing the shift to more durable AGM designs.

High‑Voltage Batteries in Audi Plug‑In Hybrids (PHEV)

Audi’s plug‑in hybrid models—badged as “TFSI e”—use a high‑voltage lithium‑ion battery to provide electric‑only range alongside a combustion engine. These systems are central to Audi’s transition strategy toward full electrification.

PHEV Models and Battery Characteristics

The list below summarizes typical Audi plug‑in hybrid models and the high‑voltage batteries they use (values may vary slightly by model year and market).

• A3 TFSI e – Compact plug‑in hybrid hatch/sedan, typically equipped with a lithium‑ion battery around 10–13 kWh, offering moderate electric‑only range for city use.
• A6, A7, and A8 TFSI e – Executive and luxury sedans with batteries often in the 14–17 kWh range, designed for silent urban commuting with powerful combined output when the engine joins in.
• Q5 and Q7 TFSI e – SUV plug‑in hybrids with similar lithium‑ion packs, tuned for a balance between electric range and towing or family‑car practicality.
• Battery placement – Typically under the rear seats, beneath the luggage compartment, or integrated into the floor to avoid compromising interior space more than necessary.

Across these models, Audi uses modular lithium‑ion pack designs tailored to platform constraints, but the core chemistry is similar: high‑energy‑density cells designed for repeated charging, moderate discharge rates, and long service life.

PHEV Battery Suppliers

Audi’s high‑voltage plug‑in hybrid batteries come from a network of global cell and module suppliers, sometimes shared across the Volkswagen Group.

• LG Energy Solution (formerly LG Chem) – A major supplier of lithium‑ion cells for several VW Group plug‑in hybrid and early EV platforms.
• CATL (Contemporary Amperex Technology Co. Limited) – Provides cells for select high‑voltage packs in Europe and China, particularly as VW Group scales up electrification.
• Samsung SDI and others – Have contributed cells or modules depending on platform and region, especially for earlier generations of PHEV systems.

While Audi typically does not publish a model‑by‑model breakdown of suppliers, these companies are responsible for the cells; Audi engineers integrate them into battery packs with proprietary cooling, safety systems, and control software.

High‑Voltage Batteries in Fully Electric Audi Models (e‑tron / Q4 e‑tron / Q8 e‑tron, etc.)

Fully electric Audis rely on large, high‑voltage lithium‑ion battery packs that are central to range, performance, and charging speed. These packs are complex systems combining cells, modules, thermal management, crash protection, and software.

Key Electric Audi Models and Their Battery Packs

The following list highlights the main electric Audi lines and typical battery configurations (note: exact capacities differ by trim, software version, and model year).

• Q8 e‑tron (previously simply “e‑tron” SUV) – Uses large under‑floor lithium‑ion packs (around 95–114 kWh gross, depending on version), enabling long‑distance cruising with DC fast‑charging capability.
• Q8 Sportback e‑tron – Shares similar battery architecture with a more aerodynamic body, improving range using the same or slightly revised pack.
• Q4 e‑tron / Q4 Sportback e‑tron – Built on the MEB platform shared with Volkswagen ID models, featuring lithium‑ion batteries around 52–82 kWh gross, depending on variant.
• e‑tron GT / RS e‑tron GT – High‑performance EVs sharing technology with the Porsche Taycan, with lithium‑ion packs around 83–93 kWh gross, engineered for repeated high‑power charging and strong acceleration.
• Q6 e‑tron (PPE platform) – Newer EV architecture co‑developed with Porsche, using advanced lithium‑ion packs with improved energy density and 800‑volt architecture for ultra‑fast charging.

These packs form the structural backbone of the vehicles, designed to keep weight low and centered for better handling while meeting strict crash and thermal safety standards.

Cell Chemistry and Suppliers for Audi EVs

Audi’s EV battery packs are built primarily around lithium‑ion chemistries such as NMC (nickel‑manganese‑cobalt) and, in some future/entry variants, LFP (lithium iron phosphate). Suppliers vary with platform and region.

The list below outlines the main trends in Audi’s EV battery sourcing.

• LG Energy Solution – Supplies NMC cells for several early Audi e‑tron and e‑tron GT variants; known for high energy density and performance.
• CATL – Increasingly important in Europe and China; provides NMC and, for some VW Group models, LFP cells that may appear in future or entry‑level Audi EVs.
• Samsung SDI – Has supplied cells for high‑performance EV platforms shared with Porsche, including some Taycan/e‑tron GT configurations.
• VW Group battery joint ventures – Over time, Audi will increasingly draw cells from Volkswagen Group’s own “PowerCo” battery operations in Europe, aimed at standardizing cell formats and lowering costs.

Audi’s strategy is to diversify suppliers while converging on standardized cell formats and chemistries, helping stabilize supply and improve long‑term serviceability and recycling.

Why Battery Type Matters for Audi Owners

For drivers, the specific brand on the label matters less than using a battery that meets Audi’s technical requirements. Batteries are now integrated into vehicle electronics, and mismatched units can cause faults or shortened life.

Replacement Considerations for 12‑Volt Batteries

When replacing a 12‑volt battery in an Audi, there are several key points owners and workshops should follow.

• Match the technology – An AGM‑equipped car should generally receive another AGM battery with equal or higher capacity; downgrading to a conventional flooded battery can cause issues.
• Observe coding requirements – Many modern Audis require the new battery to be “registered” or coded via diagnostic software so the battery management system adjusts charging strategy.
• Respect size and terminal layout – Replacement batteries must match the original’s dimensions, terminal position, and mounting points for safety and secure fitment.
• Use OEM‑grade suppliers – Batteries from Varta, Banner, Exide, Bosch, or other OEM partners are more likely to meet Audi’s performance and durability expectations.

These steps help preserve start‑stop functionality, avoid warning lights or strange electrical behavior, and ensure that the alternator and management system charge the battery correctly.

Service and Longevity of High‑Voltage Packs

High‑voltage PHEV and EV batteries are designed to last the lifecycle of the car, but their care and service differ from that of 12‑volt units.

• Manufacturer warranties – Audi typically offers separate warranties for high‑voltage batteries (often around 8 years or up to a specified mileage, depending on the market).
• Thermal management – Active cooling and heating systems within the pack help maintain optimal temperatures, improving longevity and performance.
• Software updates – Audi periodically issues software updates that can refine charging profiles, improve range estimation, or adjust thermal strategies.
• Non‑user‑serviceable – High‑voltage packs are not intended for DIY repair; only trained technicians should service or replace modules due to safety and warranty considerations.

With proper management, Audi’s high‑voltage batteries generally show gradual capacity loss rather than sudden failure, and most owners experience many years of service before performance degradation becomes noticeable.

Environmental and Future Directions

Batteries are central to Audi’s sustainability strategy as it moves toward a largely electric lineup in the 2030s. This influences everything from material sourcing to recycling.

Recycling and Second‑Life Uses

Volkswagen Group, including Audi, is investing heavily in closed‑loop battery systems. The main efforts can be grouped into several areas.

• Battery recycling plants – Facilities in Europe aim to recover valuable materials like nickel, cobalt, lithium, and copper from used Audi and VW Group packs.
• Second‑life storage – Retired EV packs that have lost some capacity for automotive use may be repurposed for stationary energy storage before final recycling.
• Design for disassembly – Newer pack designs emphasize modularity to make cell replacement and material recovery easier and more economical.
• Supplier sustainability targets – Audi increasingly requires its battery suppliers to document and reduce the carbon footprint and social impact of raw material sourcing.

These measures are meant to reduce the overall environmental impact of Audi’s growing battery fleet and stabilize the supply of critical materials as EV production scales up.

Summary

Audi uses a mix of AGM and EFB 12‑volt batteries from brands such as Varta, Exide, and Banner in its combustion and hybrid vehicles, supported by 48‑volt lithium‑ion units in mild‑hybrid models. For plug‑in hybrids and fully electric vehicles, Audi relies on high‑voltage lithium‑ion packs supplied by global leaders like LG Energy Solution, CATL, and Samsung SDI, with increasing input from Volkswagen Group’s own battery ventures. The battery type and supplier depend on the vehicle platform, region, and model year, but all are engineered to integrate tightly with Audi’s electronics, thermal systems, and long‑term sustainability goals.

Which battery is best for Audi?

The best battery for an Audi is typically a high-quality AGM (Absorbent Glass Mat) battery, though the specific size and type should match your car’s original specifications. Leading brands to consider include X2Power, Interstate, Optima, Duracell, and Varta, but the most critical factors are getting the right group size (like 48 or 49) and ensuring it’s correctly coded to the vehicle’s computer after installation. 
You can watch this video to learn how to replace and code an Audi or VW battery: 1mHayden SchreierYouTube · Sep 5, 2025
Battery type and brands

• AGM (Absorbent Glass Mat): Audi vehicles, especially those with start-stop systems, often require AGM batteries, which are a sealed, spill-proof, and more robust type of lead-acid battery. They are more resistant to vibration and extreme temperatures and generally last longer than traditional batteries. 
• Recommended brands:
  • X2Power: Specifically mentioned as a high-performance AGM option for Audi vehicles. 
  • Interstate: A popular and reliable choice with a strong track record in Audi and VW vehicles. 
  • Duracell: A quality brand available through stores like Batteries Plus, and some users have found them to be excellent replacements. 
  • Varta: An original equipment (OE) supplier, making their batteries a very reliable option. 
  • Optima: Known for durability and often recommended by Audi owners. 
  • Bosch: Offers high-performance batteries with a long lifespan. 

Sizing and specifications

• Match the original battery: The most important step is to get the correct battery size for your specific car. Check your owner’s manual or the label on the old battery for the correct “group size,” which might be a number like 48 (H6), 49 (H8), or 51R. 
• Look for matching specs: Ensure the replacement has a similar or greater Cold Cranking Amps (CCA) rating and Amp-hour (Ah) capacity. 

Installation and programming

• DIY or professional: While you can replace the battery yourself, it’s crucial to properly program the new battery to the vehicle’s computer system. 
• Why programming is essential: Audi vehicles use a Battery Management System (BMS) that needs to know the battery has been replaced to properly manage charging and power distribution. Without programming, the system won’t recognize the new battery, which can lead to reduced battery life and performance issues. 
• How to program: Programming can be done with a specialized diagnostic tool, such as an OBD-II scanner, which are available from specialty auto parts stores or can be rented. 
• Dealer option: If you are not comfortable with the process, your Audi dealer can perform the replacement and programming for you, though this may be more expensive. 

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.

Does Audi use an AGM battery?

Yes, many newer Audi models use AGM batteries, especially those with start-stop systems and high electrical demands. Older models may have used different battery types, but if a modern Audi originally came with an AGM battery, it’s crucial to replace it with another AGM battery for proper performance. 
Reasons Audi uses AGM batteries 

• High electrical demands: Newer vehicles often have power-intensive features like advanced infotainment systems, heated seats, and start-stop technology, which require a more robust battery. 
• Brake energy recovery: AGM batteries can handle the high energy demands of regenerative braking systems. 
• Start-stop systems: AGM batteries are built to withstand the frequent engine starts and stops common in modern vehicles. 
• Performance and durability: They offer better cold-cranking amps, a longer lifespan, and a lower discharge rate than traditional batteries. 

What to do when replacing your battery

• Check the original battery: Before replacing, check your current battery’s label to confirm if it’s an AGM battery. 
• Replace like-for-like: If your vehicle originally had an AGM, you should replace it with another AGM battery. Using a different type, like a standard flooded lead-acid battery, can lead to performance issues and damage the battery. 
• Register the new battery: After installation, it’s critical to register the new battery with the car’s computer system. This is usually done with a diagnostic tool and ensures the car’s charging system correctly manages the new battery’s specifications. 

Does Audi need a special battery?

Getting the right battery
Most batteries found in Audis today are referred to as value-regulated lead-acid batteries, or a VRLA. These are commonly known as rechargeable sealed batteries. These batteries are designed to adjust the voltage depending on what is needed of them.