# Start-Stop battery Fulmen FL800 12V 80Ah 800A EFB ![Start-Stop battery Fulmen FL800 12V 80Ah 800A EFB](https://baterias.com/3770-home_default/battery-fulmen-fl800-12v-80ah-800a.jpg) > Fulmen FL800 Start-Stop battery 12V 80Ah 800A EFB. Dimensions 315×175×190 mm, + terminal on the right. For Start-Stop vehicles. **Category:** [Car batteries equipped with start stop system](https://baterias.com/gb/car-batteries-equipped-with-start-stop-system) → [Fulmen](https://baterias.com/gb/fulmen) - **Canonical URL**: https://baterias.com/gb/battery-fulmen-fl800-12v-80ah-800a - **Language**: en-GB - **Brand**: Fulmen - **Reference**: BCOM-FULMEN-FL800 - **EAN**: 3661024045704 - **MPN**: FL800 - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | FULMEN | | Reference | FL800 | | Model | FULMEN EFB | | Voltage (V) | 12 V | | Largo | 315 mm | | Ancho | 175 mm | | Alto | 190 mm | | Peso | 22.1 kg | | Tecnología | EFB | | EAN | 3661024045704 | | Terminal layout | Positive terminal on the right | | Hold down | B13 | | Cold cranking amps (EN) | 800 A | | Capacity (C20) | 80 Ah (c20) | | Case type | L04 | ## Quick description **Fulmen FL800 12V 80Ah 800A** 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 80 Ah C20 🔋 Cold cranking 800 A EN-1 📏 Dimensions 315×175×190 mm ⚙️ Technology EFB 🧭 Polarity Positive on the right ⚖️ Weight 22,1 kg 🏷️ Model FULMEN EFB ## Description ## Start-Stop battery Fulmen FL800 80Ah 800A 12V 12*V* Voltage 80*Ah* Capacity 800*A* Cold cranking 22.10*kg* Weight Designed for cars with Start-Stop, regenerative braking and heavy electrical loads, the **Fulmen FL800** combines **80 Ah** and **800 A** of cold cranking current (EN) with EFB construction able to withstand hundreds of starts a day. Its 315 × 175 × 190 mm and the positive terminal on the right make it the exact replacement for the 80 Ah battery fitted as standard to many Start-Stop cars. - Direct replacement for the original Start-Stop battery. - Keeps comfort loads running with the engine off at the lights. - Fast recharge on the move thanks to low internal resistance. - EFB: the evolution of the conventional battery for basic Start-Stop cars. ### What the Fulmen FL800 is for The Fulmen FL800 is designed for cars with Start-Stop, regenerative braking and heavy electrical loads. If your car was fitted with an AGM or EFB battery, always replace it with the same technology: a conventional model would degrade within months. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 22.10 kg and B13 hold-down. ### Size, terminals and hold-down of the Fulmen FL800 It has external dimensions of 315 × 175 × 190 mm and weighs 22.10 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 B13 hold-down, the system that anchors and connects it in the vehicle. For a direct replacement, the current battery tray must accept these dimensions and the same terminal layout; otherwise adapters will be needed or the hold-down will change. ### Technology inside the Fulmen FL800 Within the Fulmen catalogue, the FL800 is the 80 Ah model designed for this application. EFB (Enhanced Flooded Battery) technology reinforces the conventional lead-acid battery with a polyester separator and carbon additives in the plates. It withstands many more start cycles and partial discharges, making it ideal for basic Start-Stop and intensive use. ### Fulmen: the maker behind the FL800 Fulmen is the historic French brand of the Exide group: batteries made on the same lines and with the same technology as original equipment, widely used by workshops across Europe. We guarantee that every Fulmen arrives new, charged and with the manufacturer's full warranty. ### Manufacturer's warranty The Fulmen FL800 comes with the **manufacturer's official warranty**. To keep it valid, always fit the same technology as the original battery (AGM or EFB) and register the replacement if your vehicle requires it. ### How to make it last longer If the vehicle only does very short trips, a periodic maintenance charge with an AGM/EFB-compatible charger greatly extends its life. Do not mix technologies: a conventional battery in a Start-Stop car degrades within months. ### 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 Fulmen FL800 an EFB battery? When is EFB used? Yes. The FL800 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 this battery compatible with Start-Stop systems? 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 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. ### How long does the Fulmen FL800 battery last? Expected lifespan of the Fulmen FL800 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 Fulmen FL800 battery? Dimensions (length × width × height) are 315×175×190 mm — also written as 315x175x190 mm and correspond to the European L4 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. ### Is the FL800 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 10:00–13:30 and 16:40–18:00 (Spanish time, CET)). The FL800 typically fits a wide range of European vehicles thanks to its standard DIN case format. ### Which batteries are equivalent to the Fulmen FL800? 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. ### 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 Fulmen FL800 is original and meets EN 50342-6. ### Do I need to register the Fulmen FL800 on the car after installation? 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 Fulmen FL800 ships factory-charged at 80-90% so you can use it straight after fitting. ## Equivalent batteries - [VARTA N80](https://baterias.com/gb/battery-varta-n80-12v-80ah-800a) - [VARTA F21](https://baterias.com/gb/battery-varta-f21-agm-12v-80ah-800a) - [TUDOR TL800](https://baterias.com/gb/battery-tudor-tl800-80ah-720a) - [TUDOR TK800](https://baterias.com/gb/battery-tudor-tk800-80ah-800a) - [VARTA LA80](https://baterias.com/gb/battery-varta-la80agm-12v-80ah-800a) - [VARTA LED80](https://baterias.com/gb/battery-varta-led80-12v-80ah-800a) ## 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 · 2026-10-03*