# Start-Stop battery Varta N50 12V 50Ah 550A EFB ![Start-Stop battery Varta N50 12V 50Ah 550A EFB](https://baterias.com/4382-home_default/battery-varta-n50-12v-50ah-550a.jpg) > Varta N50 Start-Stop battery 12V 50Ah 550A EFB. Official Varta Distributor. Dynamic EFB 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-n50-12v-50ah-550a - **Language**: en-GB - **Brand**: VARTA - **Reference**: BCOM-VARTA-N50 - **EAN**: 4016987167304 - **MPN**: N50 - **Price**: 85,15 € - **Stock**: In stock ## Technical specifications | Feature | Value | |---|---| | Brand | VARTA | | Reference | N50 | | Model | Dynamic EFB (antes Blue Dynamic EFB) | | Voltaje | 12 V | | Largo | 207 mm | | Ancho | 175 mm | | Alto | 190 mm | | Tecnología | EFB | | EAN | 4016987167304 | | Scheme | Positive terminal on the right | | Subjection | B13 | | Arranque en frío CCA EN | 550 A | | Capacidad C20 (Ah) | 50 Ah (c20) | | Box Type | H4/LN1 | | ETN extra | 550500055D842 | ## Quick description **Varta N50 12V 50Ah 550A** 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 550 A EN-1 📏 Dimensions 207×175×190 mm ⚙️ Technology EFB 🧭 Polarity Positivo a la derecha ⚖️ Weight 14,18 kg 🏷️ Model Dynamic EFB ## Description ## Varta N50 Dynamic EFB (formerly Blue Dynamic EFB) 50Ah 550A 12V Car Battery 12*V* Voltage 50*Ah* Capacity 550*A* Cold cranking The **Varta N50 car battery** is the **12 V**, **50 Ah** model delivering **550 A** of cold cranking power (EN), from Varta's **Dynamic EFB (formerly Blue Dynamic EFB)** range, designed for cars with a Start-Stop system and high electrical demand. Its 207 × 175 × 190 mm dimensions and positive terminal on the right make it the exact replacement for the 50 Ah battery fitted as standard in many cars. - Keeps the vehicle's electronic management correctly calibrated. - Built for the intensive cycling of the Start-Stop system. - A greater guaranteed number of starts than a conventional battery. - Reinforced resistance to the partial charges and discharges of daily driving. ### Vehicles compatible with the Varta N50 battery This battery is listed as compatible with more than 91 vehicles from manufacturers such as Fiat, Renault, Volkswagen, Toyota, Suzuki and Peugeot. It is a go-to choice when you need a **battery for a Fiat**, a Renault or other models built around this same format. The compatibility list also includes models from Ford, Citroën, Dacia, Skoda, Nissan, Opel, Hyundai and Lancia. 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 N50 Its external dimensions are 207 × 175 × 190 mm. 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. Before replacing it, measure the space your current battery occupies: if it matches on all three dimensions and on terminal position, the swap is direct and needs no adapters. ### The Varta N50 and the Dynamic EFB range The **Dynamic EFB** range (silver label) uses EFB technology, an enhanced lead-acid built for entry-level Start-Stop systems and vehicles with high energy demand. It takes far more cycling than a conventional battery. It is the correct replacement for cars that came with EFB from the factory and a solid step up from a standard battery. It sits one rung below AGM in terms of cycling demand. In a modern vehicle the battery powers more and more electronics, even with the engine switched off. This series is sized for that draw and for restarting the engine dozens of times a day without losing performance, something a traditional starter battery cannot take. *This battery used to belong to Varta's **Blue Dynamic EFB** range; following the brand's change of commercial naming (2025), it now forms part of the new **Dynamic EFB** series.* ### Why choose a Varta battery Choosing Varta means going with the reference the car manufacturer itself signed off in the first place. Against own-brand batteries, the difference is not the purchase price but how many winters the battery lasts before it leaves you stranded. 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 N50 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 N50 an EFB battery? When is EFB used? Yes. The N50 is an EFB (Enhanced Flooded Battery): flooded lead-acid reinforced with plate additives. Withstands more cycles than a conventional but fewer than an AGM. Fitted to cars with basic Start-Stop (no regenerative braking). More affordable than an equivalent AGM, lifespan 4-6 years. ### Is the Varta N50 battery suitable for Start-Stop? Yes. As EFB technology it is designed for Start-Stop vehicles. EFB batteries cover basic Start-Stop (no regenerative braking). 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 N50 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 N50; 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 is the Varta N50 battery installed in the vehicle? 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 N50 model cover? This battery includes 2 years of official manufacturer warranty against manufacturing defects. It applies to defects such as damaged cells, internal short-circuits or abnormal capacity loss. 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. ### How do I return the N50 model if it doesn't fit? 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 N50 battery cost? The current price at baterias.com is 85,15 € (VAT included; 70,37 € 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 N50 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. ### What is the service life of the N50 model? Expected lifespan of the Varta N50 is 4 to 6 years in basic Start-Stop car use. 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 dimensions of the Varta N50 battery? 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. ### How many kilos does this battery weigh? It weighs 14,2 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). ### How many amps does the Varta N50 battery have? Nominal capacity 50 Ah[?cca: and [cold-cranking amps 550 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. ### Does this 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 N50 fits 91 verified vehicle versions in our database. ### What are the equivalents of the N50 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. ### Which is better: Varta N50 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 reviews does the N50 model have? The average rating of the Varta N50 on baterias.com is 4.85/5 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 (4.5/5 from 11,110+ 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. ### When is EFB fitted instead of AGM? An EFB (Enhanced Flooded Battery) is a flooded lead-acid battery reinforced with plate additives (carbon and polyethylene) and thicker grids. It withstands twice the cycles of a conventional battery and handles deep discharges better, but less than an AGM. It is the original fitment on cars with basic Start-Stop (no regenerative braking): Renault Energy TCe, Peugeot/Citroën PureTech, Fiat MultiAir, Hyundai/Kia ISG, Ford EcoBoost. If your car came with EFB from the factory, this is the correct battery — upgrading to AGM is optional (marginal improvement). If it came with AGM, EFB may fall short: better fit AGM. The Varta N50 is original and meets EN 50342-6. ### 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 N50 ships factory-charged at 80-90% so you can use it straight after fitting. ## Compatible vehicles This battery fits 91 vehicles. 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