3 Best Car Batteries for Audi A3 in 2021

Is your Audi A3 getting slow to start? Are your vehicle cables heavily corroded? Then this article is for you. These signs mean that you need a replacement battery for your ride.

With all the modifications done to new models, the volume of the battery under the hood is continuously shrinking. Therefore, if you need a replacement battery for your posh car, ensure it’s a perfect fit for your vehicle. This article reviews the best three car battery for Audi A3. Relax and feel comfortable as you through this article.

The current market has a lot of battery models; finding the best battery for your vehicle may be quite a task. After extensive research, here are my top three picks for your Audi A3.

  1. Varta E39 AGM Stop Start Car Battery
  2. BOSCH S4 Starter Battery
  3. ACDelco Advantage Battery 48S

Therefore, in case your Audi’s performance starts diminishing, and you visit an expert who will advise you to search for a replacement battery, above is a list of the batteries that you should opt for. Before buying a battery, ensure it satisfies all your vehicles needs, and it’s a perfect fit for your Audi A3 model.

Top 3 Best Car Batteries for Audi A3 Reviews

As stated before, the current auto market abounds a lot of battery models which may give you a difficult task once you want to select one. However, this article reviews the top-rated car batteries for Audi A3 in the market today. Research was based on the batteries performance, output, price, customer reviews, among other specs to mention but a few.

1. VARTA E39 AGM Stop Start Car Battery

This battery is the best when it comes to matters concerning power output. The battery can offer your vehicle incredible power needed to cough your engine and also ensure all the accessories installed in the car run without failure.

This battery is three times more enduring when compared to conventional batteries. The most incredible part about this battery is that it is the perfect unit needed when your vehicle has an advanced start-stop system.


  • It has a total weight of 20.4 kg
  • Its dimensions measure 278 x 175 x 190 mm (L x W x H)
  • It has a total voltage of 12 Volts
  • It has a total amperage of 70 Amps
  • It’s cold-cranking amps are 760
  • Made of AGM design
  • Has a warranty of four years

One thing I love about this battery is that it has a warranty for four years and comes with venting outlets on either side. Also, the battery turns your vehicle on even when exposed to harsh weather conditions.

Thanks to Varta manufacturers for this incredible battery. The unit can cope with your Audi A3 that has an advanced start-stop system. This is achieved in the sense that the battery can recharge at a fast rate via the energy created by regenerative braking systems.

The battery is also highly resistant to corrosion, and it’s designed with a patented power frame grid to ensure your vehicle receives the most reliable and clean power needed to crank your engine. Amazingly, the battery has a fast recharge rate! The battery is also versatile because it can fit almost all vehicles with start-stop systems.

This battery is also unique because of its incomparable performance. It has a longer service that is three times when compared to conventional batteries. Their electrodes are made of lead-calcium that gives the battery incredible power output. Its extended warranty is also exceptional because you get a full replacement warranty once you purchase it.

The downside of this battery is that it is not fully charged when you buy it. Also, because it’s an AGM model, it needs an AGM charger or a charger with AGM settings.


  • It has a high performance
  • It’s highly resistant to corrosion
  • It can be used in all vehicles with Start-stop systems
  • Works effectively even when exposed to harsh weather conditions
  • Has an extended shelf-life
  • It plays a vital role in fuel-saving to vehicles with start-stop systems


  • It is relatively heavy
  • Not fully charged when you buy it
  • Needs an AGM specific charger when recharging

2. BOSCH S4 Starter Battery

In case your Audi A3 has been showing some starting problems, the chances are that the battery is faulty. Have no worries because the BOSCH S4 is there to solve your problems.

The battery is an incredible unit that is approved by car experts because of its incredible specs. This battery is also an incredible combo of performance and power. This battery is an excellent choice for you because of the great tech involved in manufacturing it.


  • It has a total weight of 20.1 kg
  • Its dimensions measure 27.8 x 17.5 x 19 cm (L x W x H)
  • It has a total voltage of 12 Volts
  • It has a CCA of 760
  • The total battery capacity is 70 Ah
  • Boasts AGM technology
  • It has a five years warranty

This battery is one of its kinds that are designed by use of the AGM design. The battery is free from leakage, thus making it a maintenance-free battery.

This is achieved because the unique mats are tightly laid within the lead plates, thus keeping the electrolyte within the cell. Also, it is built with high contact pressure so that there is minimal loss of active material.

What I like about this battery is that it fits all types of vehicles with a start-stop system. It’s also characterized by unique cranking power and extended service life. Once you purchase the battery, you can immediately mount it because it is fully charged.

The battery has incredible power because the reaction between the electrolyte and the plates takes place at a fast rate.

On the other hand, this battery is maintenance-free, so there is no need to keep checking the electrolyte level or refilling the battery. When compared to the standard cattery, the BOSCH S4 is four times better in matters concerning the lifespan.

Because it is designed for start-stop systems, the battery can significantly reduce the amount of carbon dioxide produced since fuel consumption is reduced by the ability to switch off the engine.

One weakness I found out in this battery is that it is only perfect for vehicles that are not used for day to day functions.


  • It is leakage free
  • It is easy to handle because of the ergonomic handles
  • It has an extended service life
  • It has flame arrestors
  • Its performance is high


  • Only suitable for emergency purposes

3. ACDelco Advantage Battery 48s

This battery is well-designed with a robust casing that is highly resistant to vibrations and any form of impact, thus ensuring its durability. The battery is also designed with robust envelope separators. High cycling abilities also characterize these batteries; thus, the reason why they are a perfect fit to start-Stop vehicles.


  • It has a total weight of 45.5 pounds
  • Its dimensions measure 11.9 x 7.5 x 7.6 inches
  • It has a total voltage of 2 Volts
  • Its reserve capacity is 140 minutes
  • It has a CCA of 810
  • It has a three years warranty

The merit about this battery is that it has robust envelope separators that ensure the electrolyte is tightly held within them instead of moving freely from cell to cell.

The manufacturers also used oxygen recombination technology to ensure the amount of water lost is reduced. This technology ensures the battery remains maintenance-free. Being made of AGM design, these batteries have a long shelf-life because of the maintained pressure on the plates that reduce active mass loss from the grid.

The battery electrodes are made of lead and lead compounds; thus, the reason why it can produce a lot of energy that can crank your engine. It also boasts an incredible reserve capacity to ensure that all accessories in your Audi A3 run without failure while maintaining your vehicle’s performance.

Similarly, the battery can be used in a variety of fields like the industrial areas as a backup, in recreational or marine vessels, in automotive or even in heavy-duty functions. The battery is tested and satisfies all the BCI needs. This is the best battery you need in case you require a reliable starting power for your Audi A3.

The negative side of this battery is, it has accessories that are made of lead and lead compounds that are known to cause cancer, and birth-related defects and other reproductive issues.

The battery has a three years warranty with a free replacement period. Choose ACDelco because of its best and incredible performance.


  • It is leakage free
  • It has a long service life
  • Has low internal resistance
  • It has high conductivity
  • Its performance is incredible
  • The battery remains cool all the time because of improved air circulation


  • Its lead and other chemical compounds are hazardous
  • It’s heavy and bulky
  • Has a slow recharge rate

The Bottom Line

Your vehicle’s performance is considered by the type of battery you have installed under your hood. Therefore, to ensure your Audi A3 works efficiently, don’t use a faulty battery! Find the best replacement battery from the reviews above. Our choices in the best three car battery for Audi A3 will never go wrong. Thank you!