# Marine battery Fulbat FDM12-550-M24 12V 79Ah 550A AGM CARBON ![Marine battery Fulbat FDM12-550-M24 12V 79Ah 550A AGM CARBON](https://baterias.com/6390-home_default/battery-fulbat-fdm12-550-m24-12v-79ah-550a.jpg) > Fulbat FDM12-550-M24 marine battery 12V 79Ah 550A AGM CARBON. FDM Marine AGM Carbon range. Dimensions 260Γ—168Γ—233 mm, + terminal on the left. **Category:** [Marine Dual Purpose Batteries](https://baterias.com/gb/marine-dual-purpose-batteries) β†’ [FULBAT](https://baterias.com/gb/fulbat) - **Canonical URL**: https://baterias.com/gb/battery-fulbat-fdm12-550-m24-12v-79ah-550a - **Language**: en-GB - **Brand**: FULBAT - **Reference**: BCOM-FULBAT-FDM12-550-M24 - **MPN**: FDM12-550-M24 - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | FULBAT | | Model | FULBAT FDM Marine AGM Carbon | | Voltage (V) | 12 V | | Largo | 260 mm | | Ancho | 168 mm | | Alto | 233 mm | | TecnologΓ­a | AGM Carbon | | Terminal layout | Positive left | | Terminal type | DT | | Cold cranking amps (EN) | 550 A | | Capacity (C20) | 79 Ah | ## Quick description **Fulbat FDM12-550-M24 12V 79Ah 550A** is a quality battery with official manufacturer warranty, confirmed stock and 24-48 h delivery across the peninsula. ### Why this battery? - **Tested and certified** to European EN standards for maximum reliability - **Sealed and maintenance-free** ready to use out of the box - **Long working life** optimised for its real-world use case πŸ”Œ Voltage 12 V ⚑ Capacity 79 Ah C20 πŸ”‹ Cold cranking 550 A EN-1 πŸ“ Dimensions 260Γ—168Γ—233 mm βš™οΈ Technology AGM 🧭 Polarity Positive on the left ## Description ## Marine battery Fulbat FDM12-550-M24 79Ah 550A 12V 12*V* Voltage 79*Ah* Capacity 550*A* Cold cranking With **79 Ah** at **12 V** and **550 A** of cold cranking current (EN), the **Fulbat FDM12-550-M24** is built for motor and sailing boats, both for engine starting and onboard services. Measuring 260 Γ— 168 Γ— 233 mm and the positive terminal on the left, it is the direct replacement for boats fitted from the factory with a 79 Ah battery of this format. - AGM: faster recharging and better cycle resistance than a conventional battery. - Ready for starting outboard and inboard engines. - Sealed: no spills or gases in the locker. - Resistant to humidity and salt air. ### What the Fulbat FDM12-550-M24 is for On board, the Fulbat FDM12-550-M24 provides 79 Ah with a case reinforced against vibration and swell. Keep the terminals clean and protected from salt humidity. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has DT terminals. ### Technology inside the Fulbat FDM12-550-M24 Within the Fulbat catalogue, the FDM12-550-M24 is the 79 Ah model designed for this application. 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. ### Will it fit your current battery tray? It has external dimensions of 260 Γ— 168 Γ— 233 mm. The positive terminal on the left decides which side the cables end up on: it is the detail that causes most buying mistakes, so check it before ordering. It uses DT terminals, 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. ### Why choose Fulbat batteries Fulbat has manufactured in France since 1978 and specialises in motorcycles and light vehicles. Its catalogue is short and clear, covers almost the whole fleet and works only with sealed, leak-free batteries. All the Fulbat batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty. ### How to make it last longer Protect the terminals with dielectric grease and check the fixing: vibration and swell loosen connections. As a service battery, avoid routine discharges below 50% to extend its cycle life. ### Manufacturer's warranty The Fulbat FDM12-550-M24 comes with the **manufacturer's official warranty** against manufacturing defects. Deep discharge from winter lay-up without charging is not covered. ### When you get it and how to return it 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 ### How is the Fulbat FDM12-550-M24 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 (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 many years does this battery last? Expected lifespan of the Fulbat FDM12-550-M24 is 4 to 7 years in regular use (depends on technology and climate). 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 Fulbat FDM12-550-M24 battery? Dimensions (length Γ— width Γ— height) are 260Γ—168Γ—233 mm β€” also written as 260x168x233 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. ### Which batteries are equivalent to the Fulbat FDM12-550-M24? 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. ## 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· 2026-09-30*