# 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. Designed for Start-Stop vehicles with regenerative braking. 2-year warranty, 24 h delivery. **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**: 100,10 € - **Stock**: In stock ## Technical specifications | Feature | Value | |---|---| | Brand | VARTA | | Reference | A9 | | Model | Dynamic AGM (antes Silver Dynamic AGM) | | Voltaje | 12 V | | Largo | 207 mm | | Ancho | 175 mm | | Alto | 190 mm | | Tecnología | AGM | | EAN | 4016987167212 | | Scheme | Positive terminal on the right | | Subjection | B13 | | Arranque en frío CCA EN | 540 A | | Capacidad C20 (Ah) | 50 Ah (c20) | | Box Type | H4/LN1 | | ETN extra | 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 🏷️ Model Dynamic AGM ## Description ## Battery Varta A9 Dynamic AGM (antes Silver Dynamic AGM) 50Ah 540A 12V By choosing a VARTA® Silver Dynamic AGM battery with the most advanced technology, you choose an excellent battery, capable of powering the most demanding vehicles and accessories as it is three times stronger than conventional batteries. VARTA® Silver Dynamic AGM batteries are perfect for advanced Start-Stop systems that require rapid battery recharging using energy supplied by regenerative braking systems. - Made in Germany in the world's largest AGM battery production facility. - Patented PowerFrame® grid for maximum starting power, quick recharge and increased corrosion resistance. - Original replacement, to replace the battery sold to the OE channel (First Equipment). - Designed for all vehicles with a start-stop system: it responds faster, works harder and lasts longer. It shares design with OE, guaranteeing maximum fuel savings in start-stop systems. ## Why choose a **Varta A9** battery? Today, the battery has become one of the most important elements of any vehicle. Both the safety systems and the auxiliary elements that equip the vehicles, depend to a great extent on the quality of the battery for its correct operation. There are countless brands of batteries on the market and it is normal for a non-expert user to have doubts about which battery to choose. For that reason, we list some of the reasons why we believe that choosing the right Varta Battery is always a wise choice: - **Leading Brand**: The Varta brand, with over 125 years of history, is the world's leading manufacturer of automotive batteries. Your Varta A9 battery is manufactured by the number one manufacturer in the industry. - **Quality**: During the manufacturing process of the Varta A9 battery, more than 100 parameters are monitored to guarantee the complete quality and reliability of the product. - **Reliability**: The main vehicle manufacturers on the market: Mercedes, BMW, Audi... rely on Varta batteries to equip their new vehicles. Working for these manufacturers means exceeding their strict quality controls and expectations for reliability. **Don't play it. Installing a good battery for your vehicle is a matter of safety and reliability**. ## 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 know if the A9 model fits my car? Three ways: 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 for the A9; 3) if you cannot find your model, message us on WhatsApp with brand, model, engine and year — we reply during business hours (Mon–Fri 9:00–18:00 CET). ### 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 of warranty does the A9 model cover? This battery includes 2 years of official manufacturer warranty against manufacturing defects. Coverage includes cell breakdowns, internal short-circuits and abnormal capacity decreases. It does NOT cover misuse (prolonged overcharging, inadequate charger, defective alternator). Once the defect is verified by technical inspection, we replace the A9 at no cost. ### How long does Varta A9 delivery take? In mainland Spain and Portugal it arrives in 24 h if you order before 17:00 and the battery is in stock — it leaves the same day and arrives the next business day. Afternoon or weekend orders ship the next business day. For Balearics, Canaries and other EU destinations, allow 2-5 days. Shipping cost is calculated in the cart based on destination and service (standard, express, cash on delivery). Tracking number is sent by email + SMS as soon as the parcel ships. ### Are returns accepted on this battery? Yes. You have 14 days from delivery to return it. In mainland Spain and Portugal returns are FREE — we cover the return shipping cost via prepaid label. In other EU countries the return shipping cost is the customer's. It must arrive in its original packaging with no signs of installation. If it was defective, the warranty covers replacement even after the 14-day period. ### How much does the Varta A9 battery cost? The current price at baterias.com is 100,10 € (VAT included; 82,73 € excl. VAT), updated every 24 hours. The applicable VAT may vary with the destination country and is confirmed in the cart. Shipping cost is calculated in the cart based on destination and chosen service (standard, express, cash on delivery). ### Where do I find the A9 model online? At baterias.com — authorised distributor with real stock, 24h delivery in mainland Spain and Portugal if you order before 17:00, and full manufacturer warranty. Shipping cost is calculated in the cart based on destination and chosen service (standard, express, cash on delivery). Secure payment by card, Bizum, PayPal or bank transfer. If you choose at-home installation, our technician will take the used battery and dispose of it through an authorised collection point. ### 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. ### What is the weight of the A9 model? It weighs 14,7 kg. Most of the weight is lead. If you plan to fit it yourself, use gloves and a carrying strap (AGM batteries are slightly heavier than conventional due to the absorbent glass-mat fibre). ### How many Ah and CCA does this battery have? Nominal capacity 50 Ah[?cca: and [cold-cranking amps 540 A]] at 12 V. Ah measure the total energy available (autonomy); CCA (also written A in cold or EN under the European standard) measure the instantaneous power to crank the starter motor. A battery with more CCA starts better in winter; one with more Ah keeps accessories on for longer. ### 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 9:00–18:00 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. ### Which is better: Varta A9 or an alternative from another brand? This battery and its equivalents from Bosch, Tudor or Exide are technically comparable: same dimensions, same voltage and same capacity. The differences are warranty (Varta and Bosch: 2 years; Tudor and Exide: 2 years on the equivalent line), manufacturing plant (Varta and Bosch share origin in the Clarios Group; Tudor and Exide belong to Exide Technologies) and price. For private use any of these brands will give 4-6 years of life. Compare them in the "Equivalents" section. ### What do users say about the Varta A9 battery? The average rating of the Varta A9 on baterias.com is 4.84/5 from 29 verified customer reviews. The product rating, when available, is shown on the product page next to the stars. You can also check our public Trustpilot profile at shop level (4.4/5 from 10,773+ verified reviews). Most-praised points: reliable cold start, lifespan above 5 years and fast delivery; most common complaints mention BMS-equipped cars that need OBD registration after fitting. ### 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. 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