# Truck battery Fulmen FJ050C 12V 50Ah 800A AGM ![Truck battery Fulmen FJ050C 12V 50Ah 800A AGM](https://baterias.com/3736-home_default/battery-fulmen-fj050c-12v-50ah-800a.jpg) > Fulmen FJ050C truck battery 12V 50Ah 800A AGM. Dimensions 260×173×206 mm, + terminal on the left. For heavy-duty fleets. **Category:** [Batteries for Heavy Machinery](https://baterias.com/gb/batteries-for-heavy-machinery) → [Fulmen](https://baterias.com/gb/fulmen) - **Canonical URL**: https://baterias.com/gb/battery-fulmen-fj050c-12v-50ah-800a - **Language**: en-GB - **Brand**: Fulmen - **Reference**: BCOM-FULMEN-FJ050C - **EAN**: 3661024046664 - **MPN**: FJ050C - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | FULMEN | | Reference | FJ050 C | | Model | FULMEN PowerPRO y Construction | | Voltaje | 12 V | | Largo | 260 mm | | Ancho | 173 mm | | Alto | 206 mm | | Peso | 17.9 kg | | Tecnología | AGM | | EAN | 3661024046664 | | Scheme | Positive terminal on the left | | Subjection | B07 | | Arranque en frío CCA EN | 800 A | | Capacidad C20 (Ah) | 50 Ah (c20) | | Box Type | G34 | ## Quick description **Fulmen FJ050C 12V 50Ah 800A** is an SHD (Super Heavy Duty) truck battery for intensive professional use. Vibration-resistant, withstands long cold-diesel cranks and deep discharges during parking with active loads (tachograph, refrigeration, heater). ### Why this truck battery? - **True Heavy Duty** built for intensive professional use - **Long cold-diesel cranks** reliable even in extreme cold - **Powers services at idle** tachograph, heater and lights with engine off 🔌 Voltage 12 V ⚡ Capacity 50 Ah C20 🔋 Cold cranking 800 A EN-1 📏 Dimensions 260×173×206 mm ⚙️ Technology AGM 🧭 Polarity Positivo a la izquierda ⚖️ Weight 17,9 kg 🏷️ Model FULMEN PowerPRO Agricultura y Construccion ## Description ## Battery Fulmen FJ050C 50Ah 800A 12V The Battery FULMEN FJ050C 50Ah 800A 12V PowerPRO y Construction belongs to the Fulmen PowerPro Agriculture & Construction Batteries range The Fulmen PowerPro Agriculture & Construction SO batteries batteries designed to meet the demanding requirements of the main manufacturers of agricultural and construction machinery. ### Ideal for: - Farm Equipment - Heavy vehicles for construction ### Battery advantages and characteristics FULMEN FJ050C 50Ah 800A 12V - Upper starter - Robust design - OE adjustment for agriculture and construction - Free of mantenimient ### How to find the right battery for your vehicle? In recent years, there has been an increase of almost 300% in the energy needs of vehicles.To select the appropriate battery, it is essential to consider not only the power and displacement of the engine, but also the equipment, the climate and the usual driving style. The wide Fulmen battery range offers a complete and varied catalog to meet the electrical demands of any vehicle. From small and simple gasoline engines to large and robust industrial engines, Fulmen batteries guarantee a reliable and safe start. If you do not find the battery you need or have doubts about which battery, do not hesitate to contact us. The Battery FULMEN FJ050C 50Ah 800A 12V PowerPRO y Construction has been designed by Fulmen with the highest peel standards Fulmen batteries guarantee a higher long -term performance and more useful life to your vehicles and devices Fulmen is a recognized battery brand, especially in the automotive sector.Fulmen is part of the Exide Technologies group, a leading company worldwide in the development and manufacture of lead-acid batteries and advanced energy storage technologies. ### Fulmen batteries, always an excellent option - Quality batteries - Greater shelf life - Great long -term performance - It has a catalog for a wide range of applications ### Before buying your Fulmen battery - **Understand your needs**: Determine the type of battery you need according to your vehicle or device.Consider the required capacity, voltage and size - **Investigate the available options**: Investigate different brands and types of batteries to find the one that best suits your needs and budget - **Check the specifications:**Be sure to carefully review the technical specifications of the battery, such as capacity, type of chemistry, dimensions and compatibility with your vehicle - **Terminals:**Check that the scheme and position of the terminal of your new battery are identical to the values of the old model If you want additional information about Battery Fulmen FJ050C, you can download the product's technical sheet at the following link: [ Download technical sheet Fulmen FJ050C 50Ah 800A 12V](/fichastecnicas/datasheet-battery-fulmen-fj050c-50ah-800a-12v.pdf) ## Frequently asked questions ### Is the Fulmen FJ050C an AGM battery and what are the benefits of AGM? Yes. The FJ050C from Fulmen 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 trucks with advanced Start-Stop and regenerative braking. Expected lifespan: 5-8 years under normal conditions. ### Is the Fulmen FJ050C 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 know if the FJ050C model fits my truck? 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 FJ050C; 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 FJ050C model in my truck? In most trucks 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 trucks with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile. ### How many months of warranty does the FJ050C truck model cover? This battery includes 1 year of official manufacturer warranty against manufacturing defects. It covers internal electrical failures and abnormal capacity drops. It does NOT cover misuse (sulfation from heavy duty without proper recharge, alternator overcharge, etc.). On confirmed defect after technical inspection, we replace the FJ050C at no cost. ### 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 Fulmen FJ050C 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. ### Where can I buy the Fulmen FJ050C battery? 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 Fulmen FJ050C battery last? Expected lifespan of the Fulmen FJ050C is 5 to 8 years in mild-climate truck 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 FJ050C model? Dimensions (length × width × height) are 260×173×206 mm — also written as 260x173x206 mm — following the European DIN standard. Always measure the space in your truck 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 FJ050C model? It weighs 17,9 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 Fulmen FJ050C battery have? Nominal capacity 50 Ah[?cca: and [cold-cranking amps 800 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 Fulmen FJ050C battery fit my truck? 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 FJ050C typically fits a wide range of European vehicles thanks to its standard DIN case format. ### Which batteries are equivalent to the Fulmen FJ050C? 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 trucks. See the "Equivalents" section to view recommended options at the same performance level. ### Is this battery a better choice than another equivalent? 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 real-world experiences are there with this battery? 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 11,496+ verified reviews). Most-praised points: reliable cold start, lifespan above 5 years and fast delivery; most common complaints mention BMS-equipped trucks that need OBD registration after fitting. ### When do I need an AGM battery like this one? 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 truck 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 Fulmen FJ050C is fully original and meets European EN 50342-6 standards for advanced Start-Stop. ### Will my truck recognise the new battery automatically? On most trucks 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 truck will still start correctly — the alternator just takes a few days to adjust the profile. The Fulmen FJ050C 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 · 2026-09-07*