Does the Audi A6 C8 55 Tfsi E Quattro need an AGM or EFB battery?

If your Audi A6 C8 55 Tfsi E Quattro has start-stop, regenerative braking or many electrical accessories, you will need an AGM or EFB battery. Check your vehicle's technical specifications.

What type of battery does my car need?

To find the exact battery you need, you need to know the make, model, and engine. If your car has a Start-Stop system (the engine shuts off at traffic lights), you need an AGM or EFB battery. An AGM battery can only be replaced with another AGM battery. However, an EFB battery can be replaced with either another EFB or an AGM battery, as the latter is superior.

What is the difference between AGM, EFB and standard batteries?

The standard battery is the conventional type. The EFB battery withstands start/stop cycles better. The AGM battery is the most durable and is mandatory in cars with Start-Stop and regenerative braking. Never replace an AGM battery with an EFB or standard battery.

How do I find the right battery for my vehicle?

Use the search tool by selecting your vehicle's make and model. Our system automatically filters compatible part numbers verified by our technicians. If you have any questions, contact us via WhatsApp.

What warranty do the batteries have?

All our batteries come with the legal guarantee provided by consumer law against manufacturing defects. If a battery has a manufacturing defect, it will be replaced at no cost to the user.

How long does it take for the battery to arrive?

Under normal circumstances, batteries usually arrive within 1 to 2 days of ordering. However, there are some cases where delivery may take a little longer: peak seasons (Black Friday, Christmas, etc.), palletized shipments, occasional stock shortages, etc.

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Audi A6 C8 55 Tfsi e quattro

Batteries for Audi A6 C8 55 Tfsi e quattro 252 hp

Audi · A6 C8

Which battery does a Audi A6 C8 55 Tfsi e quattro need?

Specifications and battery: 55 Tfsi e quattro (252 hp)

Audi A6 C8 55 Tfsi e quattro (252 hp) takes a 105 Ah, 950 A AGM battery (394 × 175 × 190 mm), with the positive terminal on the right. It is a Start-Stop battery, so it should not be replaced with a conventional one.

Start-Stop battery: Yes (AGM/EFB)

Battery for this engine

Version	Technology	Capacity	Cold cranking (EN)	Size (L×W×H)	Polarity
Main	AGM	105 Ah	950 A	394 × 175 × 190 mm	+ on the right

The same batteries also fit the 40 TDI Mild Hybrid (204 hp), 40 TDI Mild Hybrid quattro (204 hp), 45 TDI Mild Hybrid quattro (211 hp), 45 TDI Mild Hybrid quattro (231 hp) and 5 more engines of this model.

Data: vehicle specifications and the battery manufacturer's application catalogue.

🔧 Battery Expert Advisor

Battery analysis for your Audi A6 C8 55 Tfsi e quattro

Quick answer You need an AGM battery of 105 Ah. Our recommendation: VARTA A4.

VARTAA4

AGM105 Ah950 A394×175×190

€172.80

Buy

Prices and availability updated on 22/10/2026

Based on the batteries we found for your vehicle, our experts help you pick the right one.

📋 What we found

For your Audi A6 C8 55 Tfsi e quattro we found 3 compatible Start-Stop batteries.

⚡ Battery type for your vehicle

✓ Your Audi A6 C8 55 Tfsi e quattro uses the Start-Stop system. Every battery shown is compatible — no conventional options to confuse you.

🔋 Technology (AGM / EFB)

✓ All Start-Stop batteries in the list are AGM — the most advanced technology. Perfect if your current battery was AGM or EFB: AGM always replaces both. Remember to register it via OBD if your car has a BMS (BMW, Audi, VAG, Mercedes…) so the alternator charges it correctly.

📊 View AGM vs EFB vs Conventional — full comparison

⭐ Our recommendation

Our recommendation

For your Audi A6 C8 55 Tfsi e quattro we recommend the VARTA A4 (AGM, 105 Ah). It's the battery recommended by the vehicle manufacturer for your Audi A6 C8 55 Tfsi e quattro — the OEM equivalent. It also offers the highest capacity (Ah) and the highest cranking power (CCA) on the list — more headroom in cold starts and with many consumers. Varta is the world's leading manufacturer of starter batteries and supplies first-equipment (OEM) batteries to the major European car makers.

Rated 4.9/5 by 8 verified customers.
Next-day delivery if you order before 6 PM.

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Verified selection

Class: Car Batteries
Brand: Audi
Model: A6 C8
Engine: 55 Tfsi e quattro

Receive them tomorrow before 2 PM if you order before 6 PM (Spain mainland and Portugal only).

Before you buy: check 3 key points

Although the batteries shown are sourced from information provided by manufacturers, we recommend checking on your current battery:

Dimensions (length × width × height, including terminals and protrusions)
The dimensions shown are the maximum of the battery and include the height of the terminals, small ridges at the base and any lateral protrusions. Measure your current battery completely, from edge to edge. The new one must be the same size or slightly smaller — never larger, it would not fit in the housing.
Positive terminal (left or right viewed from the front — check the battery photo carefully)
Stand facing the battery, with the manufacturer's label facing you and the terminals on top. Locate the terminal marked with +: if it is on your right, it is "positive right"; if it is on your left, it is "positive left". Do not rely on how the battery is mounted in the car — the position is always measured looking only at the battery itself.
Technology (AGM, EFB or conventional — Start-Stop requires AGM or EFB)
Depending on the manufacturer, the same technology may be labelled differently: AGM may also appear as VRLA, AGM Start-Stop or AGM Deep Cycle. EFB may appear as EF, EFB+ or Enhanced Flooded Battery. Conventional may appear as SLI, Lead-Acid, Wet or Standard. If your vehicle has Start-Stop, the battery must be AGM or EFB — never conventional.

If you have any questions, just ask us and we'll be glad to advise you with no obligation.

Start-Stop & high energy demand batteries

AGM or EFB battery for start-stop vehicles and for cars with high energy demand (many electrical consumers, frequent starts). More charge cycles, better charge recovery and longer service life.

3 products

This engine comes with an AGM/EFB battery as standard: the car's charging system requires it even without Start-Stop. If in doubt, message us and we will confirm.

Comparison table of available products
Category	Make	Reference	Capacity	Cold cranking	Dimensions	Technology	Price
Start-Stop & high energy demand batteries	VARTA	A4	105 Ah	950 A	394×175×190 mm	AGM	€172.80	More info
Start-Stop & high energy demand batteries	EXIDE	EK1060	106 Ah	950 A	392×175×190 mm	AGM	€165.70	More info
Start-Stop & high energy demand batteries	TUDOR	TK1060	106 Ah	950 A	392×175×190 mm	AGM	€175.70	More info

Complete your purchase

Chargers

Chargers for your battery

1 product

Battery charger ABSAAR Pro4.0 6/12V 4A Smart Charger
- 6 V
€50.60

Frequently asked questions

: Audi A6 C8 55 Tfsi e quattro (252 hp) takes a 105 Ah, 950 A AGM battery (394 × 175 × 190 mm), with the positive terminal on the right. It is a Start-Stop battery, so it should not be replaced with a conventional one. Compatible batteries offer 105 Ah, 950 A (CCA), 12 V, case H9/L6, Start-Stop (EFB/AGM) technology. Browse the compatible battery list below.
: If your Audi A6 C8 55 Tfsi E Quattro has start-stop, regenerative braking or many electrical accessories, you will need an AGM or EFB battery. Check your vehicle's technical specifications.
: To find the exact battery you need, you need to know the make, model, and engine. If your car has a Start-Stop system (the engine shuts off at traffic lights), you need an AGM or EFB battery. An AGM battery can only be replaced with another AGM battery. However, an EFB battery can be replaced with either another EFB or an AGM battery, as the latter is superior.
: The standard battery is the conventional type. The EFB battery withstands start/stop cycles better. The AGM battery is the most durable and is mandatory in cars with Start-Stop and regenerative braking. Never replace an AGM battery with an EFB or standard battery.
: Use the search tool by selecting your vehicle's make and model. Our system automatically filters compatible part numbers verified by our technicians. If you have any questions, contact us via WhatsApp.
: All our batteries come with the legal guarantee provided by consumer law against manufacturing defects. If a battery has a manufacturing defect, it will be replaced at no cost to the user.
: Under normal circumstances, batteries usually arrive within 1 to 2 days of ordering. However, there are some cases where delivery may take a little longer: peak seasons (Black Friday, Christmas, etc.), palletized shipments, occasional stock shortages, etc.
: In mainland Spain and Portugal delivery takes 24 working hours if you order before 6:00 pm and the battery is in stock; for the Balearic Islands and other EU destinations allow 2 to 5 days. Batteries are shipped fully charged and ready to install.

Guides

: This vehicle uses an AGM or EFB Start-Stop battery: after any replacement it must be registered via OBD so the BMS applies the correct charging profile. Without this step, the battery service life could be significantly reduced; on some vehicles (BMW, Audi, VAG, Mercedes) the alternator may stop charging it altogether.

Batteries for Audi A6 C8 55 Tfsi e quattro 252 hp

Which battery does a Audi A6 C8 55 Tfsi e quattro need?