Fulbat FDM12-550-M24 · Marine battery 12V 79Ah 550A AGM CARBON
Specifications
| Brand | FULBAT |
|---|---|
| Part number | FDM12-550-M24 |
| Voltage (V) | 12V |
| Capacity (C20) | 79Ah |
| Technology | AGM Carbon |
| Length | 260mm |
| Width | 168mm |
| Height | 233mm |
| Terminal layout | Positive left |
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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 certifiedto European EN standards for maximum reliability
- Sealed and maintenance-freeready to use out of the box
- Long working lifeoptimised for its real-world use case
Voltage
12 V
Capacity
79 Ah
Cold cranking
550 A
Dimensions
260×168×233 mm
Technology
AGM
Polarity
Positive on the left
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Marine battery Fulbat FDM12-550-M24 79Ah 550A 12V
12VVoltage
79AhCapacity
550ACold 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 × 168 × 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 × 168 × 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 6:00 pm 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 14 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.
BCOM-FULBAT-FDM12-550-M24
Data sheet
- Brand
- FULBAT
- Model
- FULBAT FDM Marine AGM Carbon
- Voltage (V)
- 12V
- Length
- 260mm
- Width
- 168mm
- Height
- 233mm
- Technology
- AGM Carbon
- Terminal layout
- Positive left
- Terminal type
- DT
- Cold cranking amps (EN)
- 550A
- Capacity (C20)
- 79Ah
Specific References
- MPN
- FDM12-550-M24
Recommended accessories
How to change the battery
Step-by-step guide to replace your car battery in 15-30 minutes (longer if the battery is under the seat or in the boot) without losing vehicle settings.
Step 1. Prepare the vehicle
Park on a flat surface, switch off the engine and remove the key. Make sure all lights and electrical accessories are off. Wait 1-2 minutes before starting.
Step 2. Locate the battery
Open the bonnet. The battery is usually in the engine bay, but in many modern cars it may be in the boot or under the passenger seat. Check the manual if you cannot find it.
Step 3. Disconnect the negative (−) terminal
Use the 10 mm wrench to loosen the negative cable nut (black, marked −) and remove the cable from the post. Move it aside so it cannot touch any bodywork.
Step 4. Disconnect the positive (+) terminal
Repeat with the positive cable (red, marked +). Important: never let a terminal touch metal of the car while the other is still connected.
Step 5. Remove the old battery
Loosen the bottom hold-down clamp with the same wrench. Lift the battery carefully (it can weigh 15-25 kg). Clean the tray with a brush and baking soda if there is corrosion.
Step 6. Install the new battery
Place the battery in the same orientation as the old one (positive terminal on the same side). Tighten the hold-down clamp firmly.
Step 7. Connect the cables
Connect the positive (+) terminal first, then the negative (−). Tighten the nuts with the wrench until each terminal does not move. Apply anti-spark grease if you have any.
Step 8. Verify the engine starts
Close the bonnet. Start the engine to confirm everything works. On cars with Start-Stop or a BMS, you may need to register the battery via OBD so the alternator applies the correct charging profile.
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 (−) 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 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 × width × height) are 260×168×233 mm — also written as 260x168x233 mm — 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 — 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.
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