# Start-Stop battery Varta A4 12V 105Ah 950A AGM ![Start-Stop battery Varta A4 12V 105Ah 950A AGM](https://baterias.com/4374-home_default/battery-varta-a4-agm-12v-105ah-950a.jpg) > Varta A4 Start-Stop battery 12V 105Ah 950A AGM. Official Varta Distributor. Dynamic AGM range. Dimensions 394×175×190 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-a4-agm-12v-105ah-950a - **Language**: en-GB - **Brand**: VARTA - **Reference**: BCOM-VARTA-A4 - **EAN**: 4016987167267 - **MPN**: A4 - **Price**: 172,14 € - **Stock**: In stock ## Technical specifications | Feature | Value | |---|---| | Brand | VARTA | | Reference | A4 | | Model | Dynamic AGM (antes Silver Dynamic AGM) | | Voltaje | 12 V | | Largo | 393 mm | | Ancho | 175 mm | | Alto | 190 mm | | Peso | 29.4 kg | | Tecnología | AGM | | EAN | 4016987167267 | | Scheme | Positive terminal on the right | | Terminal | 1 | | Subjection | B13 | | Arranque en frío CCA EN | 950 A | | Capacidad C20 (Ah) | 105 Ah (c20) | | ETN | 605901095D852 | ## Quick description **Varta A4 12V 105Ah 950A** 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 105 Ah C20 🔋 Cold cranking 950 A EN-1 📏 Dimensions 394×175×190 mm ⚙️ Technology AGM 🧭 Polarity Positivo a la derecha ⚖️ Weight 28,53 kg 🏷️ Model Dynamic AGM ## Description ## Varta A4 Dynamic AGM (formerly Silver Dynamic AGM) 105Ah 950A 12V Car Battery 12*V* Voltage 105*Ah* Capacity 950*A* Cold cranking 29.4*kg* Weight The **Varta A4 car battery** is the **12 V**, **105 Ah** model delivering **950 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 393 × 175 × 190 mm and with the positive terminal on the right, it is the direct replacement for cars fitted from the factory with a 105 Ah battery in this format. - Built for the intensive cycling of the Start-Stop system. - Keeps the vehicle's electronic management correctly calibrated. - Reinforced resistance to the partial charges and discharges of daily driving. - A greater guaranteed number of starts than a conventional battery. ### Vehicles compatible with the Varta A4 battery This battery is listed as compatible with more than 149 vehicles from manufacturers such as BMW, Audi, Citroën, Nissan, Porsche and Fiat. If you are looking for a **battery for a BMW** or an Audi with these dimensions, the A4 is one of the standard replacement references. The compatibility list also includes models from Iveco, Peugeot, Mercedes-Benz, Opel, Vauxhall, Alpina, Volkswagen and Hyundai. 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 A4 Its external dimensions are 393 × 175 × 190 mm and it weighs 29.4 kg. 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 and a type 1 terminal, the system that anchors it to the vehicle's battery tray. Checking the three dimensions and the terminal positions before buying avoids the most common mistake when replacing a battery. ### The Varta A4 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 A good share of the vehicles on Europe's roads left the factory with a Varta fitted: the brand has been supplying the assembly lines of the leading automotive groups for decades. Replacing with a Varta means, in practice, giving the vehicle back the battery its manufacturer intended. Behind Varta is Clarios, one of the largest manufacturers of starter batteries in the world and a supplier to the assembly lines of numerous car brands. That German engineering heritage translates into reliable starting year after year. Varta's production combines automated lines with verification of more than 100 parameters per unit; that traceability is what underpins its reputation for reliable starting throughout the battery's life. ### Manufacturer's warranty The Varta A4 battery comes with **a 2-year official warranty** from the manufacturer. ### 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 Varta A4 an AGM battery and what are the benefits of AGM? Yes. The A4 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 Varta A4 battery suitable for Start-Stop? 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 check that the Varta A4 battery fits my vehicle? 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 A4; 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 fit the A4 model in my car? 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 A4 model cover? We provide 2 years of official manufacturer warranty against manufacturing defects. It covers cell failures, internal short-circuits and abnormal capacity drops. Wear from misuse (prolonged overcharging, wrong charger or faulty alternator) is not covered. Once the defect is verified by technical inspection, we replace the A4 at no cost. ### When will I receive the A4 model? 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. ### Can I return the Varta A4 battery if it doesn't fit or doesn't work? 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. ### What is the price of the A4 model? The current price at baterias.com is 172,14 € (VAT included; 142,26 € 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 can I buy this battery with full warranty? 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 long does the Varta A4 battery last? Expected lifespan of the Varta A4 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 A4 model? Dimensions (length × width × height) are 394×175×190 mm — also written as 394x175x190 mm and correspond to the European L6 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 A4 model? It weighs 28,5 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). ### What is the capacity and CCA of the A4 model? Nominal capacity 105 Ah[?cca: and [cold-cranking amps 950 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 A4 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 A4 fits 149 verified vehicle versions in our database. ### What are the equivalents of the A4 model? 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. ### Is the A4 model better than its equivalents from other brands? 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 A4 battery? The average rating of the Varta A4 on baterias.com is 4.76/5 from 66 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 (4.5/5 from 11,154+ 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. ### Why choose AGM instead of EFB for my Start-Stop car? 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 A4 is fully original and meets European EN 50342-6 standards for advanced Start-Stop. ### Do I need to register the Varta A4 on the car after installation? 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 A4 ships factory-charged at 80-90% so you can use it straight after fitting. ## Compatible vehicles This battery fits 149 vehicles. 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