# Car battery Fulmen FB504 12V 50Ah 360A ![Car battery Fulmen FB504 12V 50Ah 360A](https://baterias.com/3674-home_default/battery-fulmen-fb504-12v-50ah-360a.jpg) > Fulmen FB504 car battery 12V 50Ah 360A. Formula range. Dimensions 200×173×222 mm, + terminal on the right. Check fitment by plate. **Category:** [Car Batteries](https://baterias.com/gb/car-batteries) → [Fulmen](https://baterias.com/gb/fulmen) - **Canonical URL**: https://baterias.com/gb/battery-fulmen-fb504-12v-50ah-360a - **Language**: en-GB - **Brand**: Fulmen - **Reference**: BCOM-FULMEN-FB504 - **EAN**: 3661024044400 - **MPN**: FB504 - **Last updated**: 2026-10-28 - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | FULMEN | | Reference | FB504 | | Model | FULMEN Formula | | Voltage (V) | 12 V | | Largo | 200 mm | | Ancho | 173 mm | | Alto | 222 mm | | Peso | 12.9 kg | | Tecnología | Lead-acid | | EAN | 3661024044400 | | Terminal layout | Positive terminal on the right | | Terminal type | 1 | | Hold down | Korean B1 | | Cold cranking amps (EN) | 360 A | | Capacity (C20) | 50 Ah (c20) | | Case type | D20 | ## Quick description **Fulmen FB504 12V 50Ah 360A** 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 50 Ah C20 🔋 Cold cranking 360 A EN-1 📏 Dimensions 200×173×222 mm ⚙️ Technology Lead-acid 🧭 Polarity Positive on the right ⚖️ Weight 12,9 kg 🏷️ Model FULMEN Formula ## Description ## Car battery Fulmen FB504 Formula 50Ah 360A 12V 12*V* Voltage 50*Ah* Capacity 360*A* Cold cranking 12.90*kg* Weight The **Fulmen FB504** from the **Formula** range delivers **50 Ah** and **360 A** of cold cranking current (EN) at **12 V**: the usual specification for passenger cars with conventional starting, without a Start-Stop system. It replaces the original battery without adaptation in cars with a 200 × 173 × 222 mm format: same 50 Ah capacity and the positive terminal on the right. - Conventional lead-acid: the most proven and economical technology. - Reliable cold starts, even after weeks without driving. - Direct replacement for the original battery in size and terminals. - Original-equipment build quality without the dealership price. ### Dimensions, polarity and mounting The Fulmen FB504 is made in the 200 × 173 × 222 mm format and weighs 12.90 kg. The positive terminal on the right decides which side the cables end up on: it is the detail that causes most buying mistakes, so check it before ordering. It uses a Korean B1 hold-down and 1 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. ### What the Fulmen FB504 is for With 50 Ah, the Fulmen FB504 is sized for passenger cars with conventional starting, without a Start-Stop system. It is a direct replacement for the original battery as long as dimensions and terminals match. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 12.90 kg, 1 terminals and Korean B1 hold-down. ### The Fulmen FB504: Formula range and conventional lead-acid technology The **Formula** is the Fulmen range the FB504 belongs to: it shares the same construction and quality criteria with the rest of the series, and varies in capacity and format to suit each vehicle. Conventional lead-acid is the benchmark against which other technologies are compared: good cranking current, great tolerance to alternator charging and the best price per amp-hour. ### What Fulmen does differently With more than a century of history, Fulmen offers complete ranges for cars, trucks, motorcycles and leisure with the industrial quality of the Exide group. All the Fulmen batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty. ### Warranty and coverage The Fulmen FB504 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. ### Usage and maintenance tips Avoid leaving lights or accessories on with the engine off: most batteries fail not through defects but through repeated deep discharges. In normal daily use the alternator keeps the battery charged; if the car stands for weeks, a maintenance charge once a month prevents deep discharge. ### Delivery times and returns Same-day dispatch from our warehouse for in-stock orders placed **before 6:00 pm**: 24-48 working hours in mainland Spain and Portugal, 3 to 5 days in the islands and the rest of Europe. Returns are accepted for **14 days** if the battery has not been used (free collection on the Iberian mainland). You will receive tracking by email. ## Frequently asked questions ### How do I fit the FB504 model in my car? If the car manufacturer lists any extra step in the handbook, follow it. More detail in how to replace the car battery. Tool: a 10 mm spanner. Time: 15-30 minutes on almost every car, and up to double if the battery is not under the bonnet but in the boot or under a seat. What matters most is the terminal order: removing, negative (−) before positive (+); refitting, positive (+) before negative (−). In between, with the engine off and the key out, release the clamp and fit the new battery the same way round as the original, positive on the right (polarity). ### How long does the Fulmen FB504 battery last? Estimated lifespan of the Fulmen FB504: 4 to 6 years in regular car use without Start-Stop. Treat it as an approximate guide, as every case is different. What weighs most: temperature (cold makes starts harder and intense heat evaporates the electrolyte), frequent short trips, the condition of the alternator and charging system, power draw while parked and maintenance, not forgetting the type of car and Start-Stop. ### What are the dimensions of the Fulmen FB504 battery? The Fulmen FB504 takes up 200×173×222 mm (length, width and height, terminals included). Before buying, measure the space in your car: one extra millimetre can stop the hold-down clamp from closing. ### On which side is the positive of the FB504 model? The FB504 has the positive on the right: that is its polarity. If your current battery has its positive on the other side, this one is not suitable without longer cables or a reconfigured system (short-circuit risk). Face the battery with its terminals nearest you and see which side the positive post (+, red ring) is on. ### Is the FB504 valid for my vehicle? The FB504 typically fits a wide range of European vehicles thanks to its standard DIN case format. Three routes: the "Compatible vehicles" tab on this page, with the vehicles verified by our technical team; your number plate in the finder, from which DGT/DVLA/KBA detect model and engine; and WhatsApp, with make, model, engine and year, during business hours (Mon–Fri 10:00–13:30 and 16:30–18:00 (Spanish time, CET)). The car manufacturer's specifications always take priority over our tables. ### Which batteries are equivalent to the Fulmen FB504? Technology matters too: in Start-Stop cars, an EFB cannot be replaced with a conventional battery. The options at the same level are in the "Equivalents" section of this page. A battery interchangeable with the Fulmen FB504 must match it on dimensions (200×173×222 mm), polarity (positive on the right), capacity (50 Ah) and cranking current (360 A). ### Fulmen FB504 or Tudor TB504: which one to choose? The Tudor alternative that fits where the FB504 goes, with the same polarity. Compared with the FB504 it has the same Ah and cranking power. It costs €103.70 more. A straight swap with nothing to adapt; the difference is the price and the brand you prefer. ### Fulmen FB504 or Exide EB504: which one to choose? It is the verified Exide equivalent for the FB504 tray. Compared with the FB504 it has the same Ah and cranking power. It costs €97.10 more. Decide by price, brand preference and availability: both fit and crank the same. ## Equivalent batteries - [TUDOR TB504](https://baterias.com/gb/battery-tudor-tb504-50ah-360a) - [EXIDE EB504](https://baterias.com/gb/battery-exide-eb504-12v-50ah-360a) ## Technical team (editorial authorship) The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team — automotive battery specialists since 2012. → https://baterias.com/gb/technical-team --- *baterias.com — Automotive batteries · 2026-11-07*