# Car battery Varta A11 12V 45Ah 370A AGM ![Car battery Varta A11 12V 45Ah 370A AGM](https://baterias.com/4421-home_default/bateria-varta-dynamic-agm-a11-45ah.jpg) > Varta A11 car battery 12V 45Ah 370A AGM. Original, 2-year manufacturer warranty, 24 h delivery. Check compatibility by plate. **Category:** [Car Batteries](https://baterias.com/gb/car-batteries) → [VARTA](https://baterias.com/gb/varta) - **Canonical URL**: https://baterias.com/gb/bateria-varta-dynamic-agm-a11-45ah - **Language**: en-GB - **Brand**: VARTA - **Reference**: BATERIAS-VARTA-A11 - **EAN**: 4016987169940 - **MPN**: A11 - **Price**: 137,93 € - **Stock**: In stock ## Technical specifications | Feature | Value | |---|---| | Peso | 13,18 kg | | Tecnología | AGM | | Terminal | 3 | | Arranque en frío CCA EN | 370 A | | Capacidad C20 (Ah) | 45 Ah (c20) | | Voltage | 12 V | | Capacity | 45 Ah | ## Quick description **Varta A11 12V 45Ah 370A** is a starter battery with OEM-equivalent quality, designed for modern passenger cars. Delivers reliable cold-cranks even after weeks of inactivity and supports stable auxiliary loads (lights, climate control, infotainment). ### Why this car battery? - **Original-equipment quality** without dealership prices - **Lasts 4 to 6 years** buy once instead of twice - **Real human tech support** if you have any doubts before buying 🔌 Voltage 12 V ⚡ Capacity 45 Ah C20 🔋 Cold cranking 370 A EN-1 📏 Dimensions 236×126×224 mm ⚙️ Technology AGM 🧭 Polarity Positivo a la izquierda ⚖️ Weight 13,18 kg 🏷️ Model Dynamic AGM ## Description ## Batería Varta Dynamic AGM A11 45Ah La **Varta Dynamic AGM A11** de 45Ah y 370A es la batería de referencia para **vehículos con tecnología Start-Stop** y sistemas de frenado regenerativo (KERS). Fabricada con la exclusiva rejilla **PowerFrame®**, garantiza el máximo rendimiento en las condiciones más exigentes. ### ¿Por qué necesitas una AGM para tu Start-Stop? Los vehículos con Start-Stop apagan el motor en cada parada y lo arrancan automáticamente. Una batería convencional no soporta este uso intensivo: necesitas una AGM diseñada específicamente para ello. - **Hasta 3× más ciclos** que una batería convencional. - **Recarga hasta 5× más rápida** en frenada regenerativa. - **CCA 370A:** Arranque instantáneo en frío extremo. - **PowerFrame®:** Rejilla patentada con flujo eléctrico optimizado. ### Tecnología AGM PowerFrame® Varta - **Electrolito absorbido:** Sin ácido libre, 100% sellada. - **Sin mantenimiento:** No requiere revisión durante toda su vida útil. - **Montaje flexible:** Apta para compartimentos de maletero. - **Resistencia a vibraciones:** Construcción robusta para uso diario. - **Proveedor OEM:** Equipo original en BMW, Mercedes, Audi, VW, Porsche. ### Especificaciones Técnicas La Varta Dynamic AGM sustituye directamente a la batería original de tu vehículo. Consulta el manual o la etiqueta de tu batería actual para confirmar compatibilidad por referencia o por CCA/Ah. ## Frequently asked questions ### Is the Varta A11 an AGM battery and what are the benefits of AGM? Yes. The A11 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 A11 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 A11 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 A11; 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. ### What warranty does the Varta A11 battery have? This battery includes 2 years of official manufacturer warranty against manufacturing defects. It covers cell failures, internal short-circuits and abnormal capacity drops. Damage from misuse is excluded: prolonged overcharging, unsuitable chargers or a faulty alternator. If the battery fails, we replace it at no cost after a technical inspection. ### What is the delivery time for this battery? 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 A11 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. ### How much does the Varta A11 battery cost? The current price at baterias.com is 137,93 € (VAT included; 113,99 € 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 A11 battery last? Expected lifespan of the Varta A11 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 A11 model? Dimensions (length × width × height) are 236×126×224 mm — also written as 236x126x224 mm — 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. ### How much does the Varta A11 battery weigh? It weighs 13,2 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). ### Is the A11 valid for my vehicle? 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 A11 typically fits a wide range of European vehicles thanks to its standard DIN case format. ### Which batteries are equivalent to the Varta A11? 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 A11 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 reviews does the A11 model have? 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 11,009+ 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 A11 is fully original and meets European EN 50342-6 standards for advanced Start-Stop. ### Is there anything to do after replacing a Start-Stop battery? 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 A11 ships factory-charged at 80-90% so you can use it straight after fitting. ## 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 --- *baterias.com — Automotive batteries · 2026-08-06*