# Fulbat FDM12-550-M24 · Dual-purpose marine battery 12V 79Ah 550A

![Fulbat FDM12-550-M24 · Dual-purpose marine battery 12V 79Ah 550A](https://bateriasonline.es/446-home_default/fulbat-fdm12-550-m24.jpg)

> Fulbat FDM12-550-M24: 79 Ah dual-purpose marine battery, 550 A (EN), 260×168×233 mm, positive terminal on the left, carbon AGM. Ask for a no-obligation quote.

**Category:** [Dual-purpose marine batteries (starting and service)](https://bateriasonline.es/en/dual-purpose-marine-batteries) → [Fulbat](https://bateriasonline.es/en/fulbat-batteries)

- **Canonical URL**: https://bateriasonline.es/en/fulbat-fdm12-550-m24
- **Language**: en
- **Brand**: Fulbat
- **Reference**: BOL-FULBAT-FDM12-550-M24
- **MPN**: FDM12-550-M24
- **Last updated**: 2026-10-27

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Fulbat |
| Range | FULBAT FDM Marine AGM Carbon |
| Application | Boats (starting and service) |
| Technology | Carbon AGM |
| Voltage | 12 V |
| Capacity | 79 Ah |
| Cold cranking amps (EN) | 550 A |
| Length | 260 mm |
| Width | 168 mm |
| Height | 233 mm |
| Weight | 23 kg |
| Polarity | Positive terminal on the left |
| Terminal type | DUAL |

## Quick description

The Fulbat FDM12-550-M24 is a dual-purpose marine battery with 12 V, 79 Ah and 550 A cold cranking current, measuring 260 × 168 × 233 mm, with the positive terminal on the left.

## Description

## Where the Fulbat FDM12-550-M24 fits

The Fulbat FDM12-550-M24 combines starting and service in a single battery, the usual solution on boats with a single bank and moderate on-board consumption.
The FDM12-550-M24 belongs to the Fulbat FULBAT FDM Marine AGM Carbon range. [See all Fulbat batteries](https://bateriasonline.es/en/fulbat-batteries)

## Inside the FDM12-550-M24: carbon AGM technology

Inside, the FDM12-550-M24 combines AGM with a carbon additive. It is the option for solar, marine and service use with incomplete charges.

## Fulbat FDM12-550-M24 vs FDM12-800-M27 and FDM12-825-M31: which one to choose?

How the FDM12-550-M24 compares with Fulbat batteries of similar size and capacity:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Fulbat FDM12-550-M24 (this one) | 79 Ah | 550 A | 260 × 168 × 233 | left | 23 kg |
| Fulbat FDM12-800-M27 | 92 Ah | 800 A | 306 × 168 × 233 | left | 28.5 kg |
| Fulbat FDM12-825-M31 | 105 Ah | 825 A | 330 × 173 × 237 | left | 30.6 kg |

- Fulbat FDM12-800-M27: 13 Ah more, 250 A more cranking power, a different case (306 × 168 × 233 mm).
- Fulbat FDM12-825-M31: 26 Ah more, 275 A more cranking power, a different case (330 × 173 × 237 mm).

## Equivalents and alternatives to the Fulbat FDM12-550-M24

We have no other battery with exactly the dimensions and polarity of the FDM12-550-M24. Browse the rest of our [dual-purpose marine batteries (starting and service)](https://bateriasonline.es/en/dual-purpose-marine-batteries) to compare close options.

## Part numbers and codes for the Fulbat FDM12-550-M24

Shops, garages and catalogues identify the FDM12-550-M24 with these codes:

| Commercial reference | FDM12-550-M24 |
|---|---|
| Terminal type | DUAL |

## What to look at before buying the FDM12-550-M24

- Cold cranking: 550 A (EN), equal to or higher than the original.
- Your current battery should say about 79 Ah; a little more is also fine.
- With the terminals facing you, the positive terminal of the FDM12-550-M24 is on the left.
- Length, width and height of the FDM12-550-M24: 260 × 168 × 233 mm.

## Frequently asked questions about the Fulbat FDM12-550-M24

### FDM12-550-M24 or FDM12-800-M27: which one suits me?

Compared with the FDM12-550-M24, the Fulbat FDM12-800-M27 has 13 Ah more and 250 A more cranking power. If your current battery says 800 A or more, choose the FDM12-800-M27; if it says 550 A or less, the FDM12-550-M24 is enough. Mind the space: the FDM12-800-M27 measures 306 × 168 × 233 mm.

### How much does the Fulbat FDM12-550-M24 weigh?

23 kg, with 79 Ah of capacity. For reference, the Fulbat FDM12-800-M27 (92 Ah) weighs 28.5 kg.

### Which side is the positive terminal on the Fulbat FDM12-550-M24?

On the FDM12-550-M24, the positive terminal is on the left with the terminals facing you: compare it with your current battery, because with reversed polarity the cables will not reach.

### Do I need a special charger on board?

A charger with a profile for the battery's technology (AGM, gel or flooded) and a maintenance mode. Marine chargers usually include temperature compensation.

## More batteries to compare with the FDM12-550-M24

- [Other dual-purpose marine batteries (starting and service)](https://bateriasonline.es/en/dual-purpose-marine-batteries)
- [More Fulbat models](https://bateriasonline.es/en/fulbat-batteries)

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