# Car battery Varta A11 12V 45Ah 370A AGM ![Car battery Varta A11 12V 45Ah 370A AGM](https://baterias.com/4421-home_default/battery-varta-dynamic-agm-a11-45ah.jpg) > Varta A11 car battery 12V 45Ah 370A AGM. Original, official manufacturer warranty, 24-48 h delivery (mainland ES/PT). Check compatibility by plate. **Category:** [Car Batteries](https://baterias.com/gb/car-batteries) β†’ [VARTA](https://baterias.com/gb/varta) - **Canonical URL**: https://baterias.com/gb/battery-varta-dynamic-agm-a11-45ah - **Language**: en-GB - **Brand**: VARTA - **Reference**: BATERIAS-VARTA-A11 - **EAN**: 4016987169940 - **MPN**: A11 - **Price**: 138,60 € - **Stock**: In stock ## Technical specifications | Feature | Value | |---|---| | Peso | 13,18 kg | | TecnologΓ­a | AGM | | Terminal type | 3 | | Cold cranking amps (EN) | 370 A | | Capacity (C20) | 45 Ah (c20) | | Voltage (V) | 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 πŸ”Œ Voltage 12 V ⚑ Capacity 45 Ah C20 πŸ”‹ Cold cranking 370 A EN-1 πŸ“ Dimensions 236Γ—126Γ—224 mm βš™οΈ Technology AGM 🧭 Polarity Positive on the left βš–οΈ Weight 13,18 kg 🏷️ Model Dynamic AGM ## Description ## Car battery Varta A11 45Ah 370A 12V 12*V* Voltage 45*Ah* Capacity 370*A* Cold cranking 13.18*kg* Weight The **Varta A11** delivers **45 Ah** and **370 A** of cold cranking current (EN) at **12 V**: the usual specification for passenger cars with conventional starting, without a Start-Stop system. Measuring 236 Γ— 126 Γ— 224 mm, it is the direct replacement for cars fitted from the factory with a 45 Ah battery of this format. - AGM: faster recharging and better cycle resistance than a conventional battery. - Stable voltage for the vehicle electronics (ECU, sensors, climate control). - Low self-discharge: copes with long stops without losing charge. - Designed to last several years under normal daily use. ### What the Varta A11 is for Designed for passenger cars with conventional starting, without a Start-Stop system, the Varta A11 is the direct replacement when your vehicle uses a 45 Ah battery of this format. Before buying, compare dimensions, terminals and capacity with the battery you are replacing. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 13.18 kg and 3 terminals. ### Dimensions, polarity and mounting It has external dimensions of 236 Γ— 126 Γ— 224 mm and weighs 13.18 kg. It uses 3 terminals, the system that anchors and connects it in the vehicle. Checking the three dimensions and the terminal position before buying avoids the most common mistake when replacing a battery. ### Varta: the maker behind the A11 Varta is Europe's leading starter battery manufacturer and original-equipment supplier to most car makers. Every battery is checked on more than a hundred parameters before leaving the plant. At baterias.com we work directly with the manufacturer or its official distributor: real stock, brand-new product and official warranty. ### Technology inside the Varta A11 The A11 is one of the Varta references for this type of use; it shares the same manufacturing and quality-control criteria as the rest of the brand's catalogue. AGM (Absorbent Glass Mat) technology seals the electrolyte in glass microfibre. The result is a maintenance-free battery that is highly vibration-resistant and able to withstand deep discharges that would ruin a classic lead-acid battery. ### How to make it last longer Keep the terminals clean and tight, and check that the resting voltage does not drop below 12.4 V: below that it is time to recharge. Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators. ### Official warranty The Varta A11 comes with the **manufacturer's official warranty** against manufacturing defects; the exact period is stated in the brand's conditions. If it fails through a defect within the period, we replace it free of charge. ### Delivery times and returns Orders placed **before [[ks:cutoff]]** with the battery in stock ship the same day. Delivery in mainland Spain and Portugal takes 24-48 working hours; for the Balearic and Canary Islands and the rest of the European Union allow 3 to 5 working days. You have **[[ks:return_days]] days** to return an unused battery; in mainland Spain and Portugal collection is free. We email you the tracking number as soon as the parcel ships. ## 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 β€” 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 (βˆ’) 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 β€” match the polarity shown on the product sheet; 6) connect the positive (+) first, then the negative (βˆ’). On cars with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile. ### 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 Γ— width Γ— height) are 236Γ—126Γ—224 mm β€” also written as 236x126x224 mm β€” 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. ### 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 β€” we reply during business hours (Mon–Fri 10:00–13:30 and 16:40–18:00 (Spanish time, 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 β€” 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. ### 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 3Γ— 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 β€” 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 β€” 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. ## Equivalent batteries - [OPTIMA YTS-2.7J](https://baterias.com/gb/battery-optima-yellow-top-yts-27j-8070-176--12v-38ah) ## Technical team (editorial authorship) The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team β€” over 25 years of experience validating automotive batteries. β†’ https://baterias.com/gb/technical-team --- *baterias.com β€” Automotive batteries Β· 2026-09-28*