# Fulbat FDM12-900 · Dual-purpose marine battery 12V 180Ah 900A

![Fulbat FDM12-900 · Dual-purpose marine battery 12V 180Ah 900A](https://bateriasonline.es/459-home_default/fulbat-fdm12-900.jpg)

> Fulbat FDM12-900: 180 Ah dual-purpose marine battery, 900 A (EN), 512×222×218 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-fdm12-900
- **Language**: en
- **Brand**: Fulbat
- **Reference**: BOL-FULBAT-FDM12-900
- **MPN**: FDM12-900
- **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 | 180 Ah |
| Cold cranking amps (EN) | 900 A |
| Length | 512 mm |
| Width | 222 mm |
| Height | 218 mm |
| Weight | 51 kg |
| Polarity | Positive terminal on the left |
| Terminal type | AUTOMOTIVE |

## Quick description

The Fulbat FDM12-900 is a dual-purpose marine battery with 12 V, 180 Ah and 900 A cold cranking current, measuring 512 × 222 × 218 mm, with the positive terminal on the left.

## Description

## Who the Fulbat FDM12-900 is for

The Fulbat FDM12-900 combines starting and service in a single battery, the usual solution on boats with a single bank and moderate on-board consumption.
The FDM12-900 belongs to the Fulbat FULBAT FDM Marine AGM Carbon range. [See all Fulbat batteries](https://bateriasonline.es/en/fulbat-batteries)

## Equivalents and alternatives to the Fulbat FDM12-900

No other reference in the catalogue fully matches the dimensions and polarity of the FDM12-900; you will find the closest ones among our [dual-purpose marine batteries (starting and service)](https://bateriasonline.es/en/dual-purpose-marine-batteries).

## Fulbat FDM12-900 vs FDM12-700 and FDM12-1000

How the FDM12-900 compares with Fulbat batteries of similar size and capacity:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Fulbat FDM12-900 (this one) | 180 Ah | 900 A | 512 × 222 × 218 | left | 51 kg |
| Fulbat FDM12-700 | 140 Ah | 700 A | 512 × 188 × 218 | left | 42 kg |
| Fulbat FDM12-1000 | 240 Ah | 1,000 A | 517 × 272 × 240 | left | 71 kg |

- Fulbat FDM12-700: 40 Ah less, 200 A less cranking power, a different case (512 × 188 × 218 mm).
- Fulbat FDM12-1000: 60 Ah more, 100 A more cranking power, a different case (517 × 272 × 240 mm).

## Inside the FDM12-900: carbon AGM technology

Inside, the FDM12-900 combines AGM with a carbon additive. It is the option for solar, marine and service use with incomplete charges.

## Check this before ordering the Fulbat FDM12-900

- Length, width and height of the FDM12-900: 512 × 222 × 218 mm.
- The FDM12-900 has the positive terminal on the left: compare it with your current battery.
- Your current battery should say about 180 Ah; a little more is also fine.
- The FDM12-900 delivers 900 A cold cranking (EN standard); do not go below what your original battery states.

## Fulbat FDM12-900 codes and part numbers

This is how the Fulbat FDM12-900 appears on the label and in parts catalogues:

| Commercial reference | FDM12-900 |
|---|---|
| Terminal type | AUTOMOTIVE |
| Not to be confused with | Fulbat FDM12-700 (140 Ah, 700 A) |

## Frequently asked questions about the Fulbat FDM12-900

### Fulbat FDM12-900 or FDM12-700?

Compared with the FDM12-900, the Fulbat FDM12-700 has 40 Ah less and 200 A less cranking power. The FDM12-900 cranks harder; the FDM12-700 is only a good option if your original battery says 700 A or less. Mind the space: the FDM12-700 measures 512 × 188 × 218 mm.

### How much does the Fulbat FDM12-900 weigh?

The FDM12-900 weighs 51 kg. For reference, the Fulbat FDM12-700 (140 Ah) weighs 42 kg.

### Which side is the positive terminal on the Fulbat FDM12-900?

The FDM12-900 has the positive terminal on the left, looking at the battery from its long side with the terminals closest to you.

## More batteries to compare with the FDM12-900

- [All dual-purpose marine batteries (starting and service)](https://bateriasonline.es/en/dual-purpose-marine-batteries)
- [The whole Fulbat range](https://bateriasonline.es/en/fulbat-batteries)

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*bateriasonline.es — Batteries and accessories · 2026-11-10*