# Start-Stop battery Varta A9 12V 50Ah 540A AGM

![Start-Stop battery Varta A9 12V 50Ah 540A AGM](https://baterias.com/4378-home_default/battery-varta-a9-12v-50ah-540a.jpg)

> Varta A9 Start-Stop battery 12V 50Ah 540A AGM. Official Varta Distributor. Dynamic AGM range. Dimensions 207×175×190 mm, + terminal on the right.

**Category:** [Car batteries equipped with start stop system](https://baterias.com/gb/car-batteries-equipped-with-start-stop-system) → [VARTA](https://baterias.com/gb/varta)

- **Canonical URL**: https://baterias.com/gb/battery-varta-a9-12v-50ah-540a
- **Language**: en-GB
- **Brand**: VARTA
- **Reference**: BCOM-VARTA-A9
- **EAN**: 4016987167212
- **MPN**: A9
- **Price**: 118,90 €
- **Stock**: In stock

## Technical specifications

| Feature | Value |
|---|---|
| Brand | VARTA |
| Reference | A9 |
| Model | Dynamic AGM (antes Silver Dynamic AGM) |
| Voltage (V) | 12 V |
| Largo | 207 mm |
| Ancho | 175 mm |
| Alto | 190 mm |
| Tecnología | AGM |
| EAN | 4016987167212 |
| Terminal layout | Positive terminal on the right |
| Hold down | B13 |
| Cold cranking amps (EN) | 540 A |
| Capacity (C20) | 50 Ah (c20) |
| Case type | H4/LN1 |
| Additional ETN | 550901054J382 |

## Quick description

**Varta A9 12V 50Ah 540A** is a battery designed specifically for Start-Stop vehicles. Withstands up to 3× more start cycles than a conventional battery and maintains performance with BMS and regenerative braking systems.

### Why this Start-Stop battery?

- **Designed for Start-Stop** built for the intensive cycling of modern cars
- **2 to 3 times longer life** vs fitting a cheap conventional battery
- **Fast recovery** recharges in minutes once the engine is running

🔌 Voltage
12 V

⚡ Capacity
50 Ah C20

🔋 Cold cranking
540 A EN-1

📏 Dimensions
207×175×190 mm

⚙️ Technology
AGM

🧭 Polarity
Positive on the right

⚖️ Weight
14,72 kg

🏷️ Model
Dynamic AGM

## Description

## Varta A9 Dynamic AGM (formerly Silver Dynamic AGM) 50Ah 540A 12V Car Battery

12*V* Voltage
50*Ah* Capacity
540*A* Cold cranking

The **Varta A9 car battery** is the **12 V**, **50 Ah** model delivering **540 A** of cold cranking power (EN), from Varta's **Dynamic AGM (formerly Silver Dynamic AGM)** range, designed for cars with a Start-Stop system and high electrical demand. Measuring 207 × 175 × 190 mm and with the positive terminal on the right, it is the direct replacement for cars fitted from the factory with a 50 Ah battery in this format.
- A greater guaranteed number of starts than a conventional battery.
- Reinforced resistance to the partial charges and discharges of daily driving.
- Keeps the vehicle's electronic management correctly calibrated.
- Built for the intensive cycling of the Start-Stop system.

### Vehicles compatible with the Varta A9 battery

The Varta A9 is compatible with more than 90 vehicles: it is fitted as standard or as a replacement by brands such as BMW, Hyundai, Renault, Toyota, Volkswagen and Fiat. It is a go-to choice when you need a **battery for a BMW**, a Hyundai or other models built around this same format. Added to that list are models from Kia, Ford, Nissan, Dacia, Skoda, Suzuki, MINI and Cupra. Not sure whether it is the right one for your car? Check in seconds by entering your **registration number** in our finder.

### Format and fitting of the Varta A9

The Varta A9 is made in the 207 × 175 × 190 mm format. The positive terminal on the right determines which side the cables sit on: it is the detail that causes the most buying mistakes, so it is worth checking before you order. It uses a B13 hold-down, the system that anchors it to the vehicle's battery tray. For the swap to be direct, the space your current battery occupies must match those three dimensions and the same terminal layout; otherwise you will need adapters or the hold-down will have to change.

### The Varta A9 and the Dynamic AGM range

The **Dynamic AGM** range (gold label) is Varta's top of the range for cars: AGM technology, with the electrolyte absorbed in glass fibre, designed for the most advanced Start-Stop systems and for braking energy recovery.
It withstands thousands of charge and discharge cycles without losing performance and is the only correct choice when the car came with AGM from new. Ideal for vehicles with high electrical consumption and very frequent starts.
The difference from a conventional battery lies in the construction: separators and plates built for thousands of partial charge and discharge cycles. Fitting a standard battery to a car with Start-Stop shortens its life dramatically; this range avoids that mistake and keeps the fuel-saving system working. *This battery used to belong to Varta's **Silver Dynamic AGM** range; following the brand's change of commercial naming (2025), it now forms part of the new **Dynamic AGM** series.*

### Why choose a Varta battery

Varta is an original equipment (OEM) supplier to a good share of Europe's car manufacturers: many cars leave the factory with a Varta fitted. Buying a replacement means, in most cases, refitting the original battery with the same quality and the brand's official warranty.
Varta batteries are made under the Clarios group with German technology and quality controls that make them one of the best-selling choices in Europe. As a lead battery, it is 100% recyclable through any collection point.
Varta is Europe's leading manufacturer of starter batteries: its production volume and quality controls guarantee consistent reliability batch after batch, something own-brand labels cannot always promise.

### Manufacturer's warranty

The Varta A9 battery comes with the **official manufacturer warranty**.

### Care and maintenance

In a vehicle with Start-Stop the battery works much harder, so make journeys long enough for it to recharge and always replace it with the same type (AGM for AGM, EFB for EFB) so the electronic management is not thrown out of calibration. To get the best from it, avoid very short trips, which prevent it from recharging after each start. Keeping the terminals clean and the battery securely mounted prevents faults caused by vibration in the engine bay.

## Frequently asked questions

### Is the A9 model AGM? What does this technology offer?

Yes. The A9 from Varta uses AGM (Absorbent Glass Mat) technology: a sealed lead-acid battery where the electrolyte is absorbed in a glass-fibre mat. It withstands more charge/discharge cycles than a conventional one, handles heat better and is the required technology for cars with advanced Start-Stop and regenerative braking. Expected lifespan: 5-8 years under normal conditions.

### Is the A9 model suitable for Start-Stop cars?

Yes. As AGM technology it is designed for Start-Stop vehicles. AGM batteries support advanced Start-Stop and regenerative braking thanks to their higher cycle count. EFB is recommended for basic Start-Stop; AGM is recommended when regenerative braking is also present, thanks to its higher cycle capability. It works straight out of the box — on most modern vehicles registering the battery via OBD is recommended so the alternator automatically applies the optimal charging profile.

### How do I change this battery step by step?

In most cars it fits in 15-30 minutes with a 10 mm wrench; if the battery is under the seat or in the boot the time can double. See the step-by-step guide on this page. Quick summary: 1) switch off the engine and remove the key; 2) locate the original battery (engine bay, boot or under seat); 3) disconnect the negative (−) terminal first, then the positive (+); 4) loosen the hold-down clamp and remove the old battery; 5) fit the new one in the same orientation — match the polarity shown on the product sheet; 6) connect the positive (+) first, then the negative (−). On cars with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile.

### How many years does this battery last?

Expected lifespan of the Varta A9 is 5 to 8 years in mild-climate car use with Start-Stop. In cold regions it drops slightly due to cold-start stress; in very hot regions it also drops because of electrolyte evaporation. To extend its life: avoid deep discharges (headlights on with engine off), have the alternator checked yearly, and keep the battery clean and properly secured.

### What are the measurements of the A9 model?

Dimensions (length × width × height) are 207×175×190 mm — also written as 207x175x190 mm and correspond to the European L1 case size — following the European DIN standard. Always measure the space in your car before buying: even one extra millimetre can prevent the hold-down clamp from closing. The height shown includes the terminals.

### Will the Varta A9 battery fit my car?

Three options to confirm: 1) enter your number plate in the finder (DGT/DVLA/KBA auto-detect your model and engine); 2) check the "Compatible vehicles" tab on this page, where we list every vehicle verified by our technical team; 3) if you cannot find your model, message us on WhatsApp with brand, model, engine and year — we reply during business hours (Mon–Fri 10:00–13:30 and 16:40–18:00 (Spanish time, CET)). The A9 fits 90 verified vehicle versions in our database.

### Which batteries are equivalent to the Varta A9?

Directly interchangeable batteries (same dimensions, same polarity, same Ah and CCA) are the OEM equivalents from leading brands: Bosch, Tudor, Exide and, depending on the model, Banner or Yuasa. Exact equivalence depends on technology — an EFB cannot be replaced with a conventional battery in Start-Stop cars. See the "Equivalents" section to view recommended options at the same performance level.

### What advantages does the Varta A9 AGM battery offer over an EFB?

AGM (Absorbent Glass Mat) technology uses absorbent fibreglass that retains the electrolyte, eliminating leaks and allowing up to 3× more charge/discharge cycles than a conventional battery. It is the recommended option when the car has advanced Start-Stop with regenerative braking (BMW EfficientDynamics, Mercedes Eco, Audi MHEV, Land Rover ECO, Volvo i-Stop). Withstands tilted positions, high vibration and extreme temperatures better than EFB. The Varta A9 is fully original and meets European EN 50342-6 standards for advanced Start-Stop.

### Will my car recognise the new battery automatically?

On most cars it is not strictly necessary — the alternator detects the new battery and adapts the charge automatically. It is recommended to register the battery via OBD so that the alternator applies the optimal charging profile from the first minute and extends the battery life as much as possible (especially on brands with sophisticated BMS: BMW, Mercedes, Audi, Volvo, Land Rover). Any workshop with an OBD scanner (~10-15 € labour) does it in 5 minutes. DIY apps: VCDS / Carista (VAG), Bimmercode (BMW), iCarsoft. If you do not register, the car will still start correctly — the alternator just takes a few days to adjust the profile. The Varta A9 ships factory-charged at 80-90% so you can use it straight after fitting.


## Compatible vehicles

This battery fits 90 vehicles. Most searched:

- [BMW 5 (G30, F90) (2016)](https://baterias.com/gb/car-batteries/bmw/5-g30-f90)
- [HYUNDAI i10 I (PA) (2007)](https://baterias.com/gb/car-batteries/hyundai/i10-i-pa)
- [BMW X3 (G01, F97, G08) (2017)](https://baterias.com/gb/car-batteries/bmw/x3-g01-f97-g08)
- [RENAULT ZOE (BFM\_) (2012)](https://baterias.com/gb/car-batteries/renault/zoe-bfm)
- [BMW 5 Touring (G31) (2017)](https://baterias.com/gb/car-batteries/bmw/5-touring-g31)
- [DACIA SANDERO (2008)](https://baterias.com/gb/car-batteries/dacia/sandero)
- [TOYOTA C-HR (\_X1\_) (2016)](https://baterias.com/gb/car-batteries/toyota/c-hr-_x1)
- [FIAT 500 (312\_) (2007)](https://baterias.com/gb/car-batteries/fiat/500-312)
- [VOLKSWAGEN T-CROSS (C11, D31) (2018)](https://baterias.com/gb/car-batteries/volkswagen/t-cross-c11-d31)
- [VOLKSWAGEN ID.3 (E11, E12) (2019)](https://baterias.com/gb/car-batteries/volkswagen/id3-e11-e12)
- [FORD KUGA III (DFK) (2019)](https://baterias.com/gb/car-batteries/ford/kuga-iii-dfk)
- [TOYOTA COROLLA Hatchback (\_E21\_, \_EA1\_, \_EH1\_) (2018)](https://baterias.com/gb/car-batteries/toyota/corolla-hatchback-_e21_-_ea1_-_eh1)
- [HYUNDAI KONA (OS, OSE, OSI) (2017)](https://baterias.com/gb/car-batteries/hyundai/kona-os-ose-osi)
- [HYUNDAI i10 II (BA, IA) (2013)](https://baterias.com/gb/car-batteries/hyundai/i10-ii-ba-ia)
- [TOYOTA AYGO (\_B4\_) (2014)](https://baterias.com/gb/car-batteries/toyota/aygo-_b4)

## Equivalent batteries

- [VARTA N50](https://baterias.com/gb/battery-varta-n50-12v-50ah-550a)
- [EXIDE EK500](https://baterias.com/gb/battery-exide-ek500-12v-50ah)
- [TUDOR TK500](https://baterias.com/gb/battery-tudor-tk500-12v-50ah)
- [VARTA LFS52](https://baterias.com/gb/battery-varta-lfs52-12v-52ah-470a)
- [VARTA C30](https://baterias.com/gb/battery-varta-c30-12v-54ah-530a)

## Reviews

- **Average rating**: 4.83 / 5 (31 reviews)

## Technical team (editorial authorship)

The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team — over 25 years of experience validating automotive batteries.

→ https://baterias.com/gb/technical-team

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*baterias.com — Automotive batteries · 2026-09-30*