# Fulmen FC904 · Car battery 12V 90Ah 680A

![Fulmen FC904 · Car battery 12V 90Ah 680A](https://bateriasonline.es/3024-home_default/fulmen-fc904.jpg)

> Fulmen FC904: 90 Ah car battery, 680 A (EN), 306×173×222 mm, positive terminal on the right, D31 case. Equivalent to Exide EC904 and Exide EB954.

**Category:** [Car batteries](https://bateriasonline.es/en/car-batteries) → [Fulmen](https://bateriasonline.es/en/fulmen-batteries)

- **Canonical URL**: https://bateriasonline.es/en/fulmen-fc904
- **Language**: en
- **Brand**: Fulmen
- **Reference**: BOL-FULMEN-FC904
- **EAN**: 3661024044752
- **MPN**: FC904
- **Last updated**: 2026-11-07

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Fulmen |
| Range | FULMEN Standard |
| Application | Cars |
| Technology | Lead-acid |
| Voltage | 12 V |
| Capacity | 90 Ah |
| Cold cranking amps (EN) | 680 A |
| Length | 306 mm |
| Width | 173 mm |
| Height | 222 mm |
| Weight | 19.9 kg |
| Polarity | Positive terminal on the right |
| Case size | D31 (306 × 173 × 225 mm) |

## Quick description

The Fulmen FC904 is a car battery with 12 V, 90 Ah and 680 A cold cranking current, case size D31 (306 × 173 × 222 mm), with the positive terminal on the right. Need the positive terminal on the left? The same battery is the Fulmen FC905.

## Description

## Where the Fulmen FC904 fits

The Fulmen FC904 is made for petrol and diesel cars without automatic engine stop. The FC904 covers the daily routine of a car without automatic engine stop: cold starts, short trips and loads with the ignition off.
At 90 Ah it moves into large diesels, SUVs, vans and cars with heavy electrical equipment. The FC904 belongs to the Fulmen FULMEN Standard range. [More Fulmen batteries](https://bateriasonline.es/en/fulmen-batteries)

## Fulmen FC904 vs FA954, FC905 and FB954

Torn between the FC904 and another similar Fulmen? This is what changes:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Fulmen FC904 (this one) | 90 Ah | 680 A | 306 × 173 × 222 | right | 19.9 kg |
| Fulmen FA954 | 95 Ah | 800 A | 306 × 173 × 222 | right | 21.4 kg |
| Fulmen FC905 | 90 Ah | 680 A | 306 × 173 × 222 | left | 19.9 kg |
| Fulmen FB954 | 95 Ah | 760 A | 306 × 173 × 222 | right | 20.6 kg |

- Fulmen FA954: 5 Ah more, 120 A more cranking power, the same D31 case.
- Fulmen FC905: identical to the FC904 except for the positive terminal, which is on the other side (positive terminal on the left).
- Fulmen FB954: 5 Ah more, 80 A more cranking power, the same D31 case.

## Part numbers and codes for the Fulmen FC904

Shops, garages and catalogues identify the FC904 with these codes:

| Commercial reference | FC904 |
|---|---|
| EAN | 3661024044752 |
| Case size (EN) | D31 |
| Not to be confused with | Fulmen FC905 (90 Ah, 680 A, positive terminal on the left), Fulmen FC900 (90 Ah, 720 A) |

## Equivalents and alternatives to the Fulmen FC904

Batteries that fit the FC904's tray with the same polarity; besides other conventional batteries, an EFB or AGM of this size is a valid upgrade for the FC904.

| Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Exide EC904 | Lead-acid | 90 Ah | 680 A | 306 × 173 × 222 |
| Tudor TC904 | Lead-acid | 90 Ah | 680 A | 306 × 173 × 222 |
| Deta DC904 | Lead-acid | 90 Ah | 680 A | 306 × 173 × 222 |
| Exide EB954 | Lead-acid | 95 Ah | 760 A | 306 × 173 × 222 |
| Tudor TB954 | Lead-acid | 95 Ah | 760 A | 306 × 173 × 222 |
| Deta DB954 | Lead-acid | 95 Ah | 760 A | 306 × 173 × 222 |

## Check this before ordering the Fulmen FC904

- Length, width and height of the FC904: 306 × 173 × 222 mm (European case size D31).
- With the terminals facing you, the positive terminal of the FC904 is on the right.
- Your current battery should say about 90 Ah; a little more is also fine.
- Cold cranking: 680 A (EN), equal to or higher than the original.
- If your car has Start-Stop, the FC904 is not the right one: it needs an EFB or an AGM.

## Inside the FC904: lead-acid technology

Inside, the FC904 is classic lead-acid: liquid electrolyte and lead plates. It is a robust, well-known technology with a good capacity-to-price ratio, and still the basis of most cars, trucks and traction equipment.

## Frequently asked questions about the Fulmen FC904

### FC904 or FA954: which one suits me?

Compared with the FC904, the Fulmen FA954 has 5 Ah more and 120 A more cranking power. If your current battery says 800 A or more, choose the FA954; if it says 680 A or less, the FC904 is enough. Both measure 306 × 173 × 222 mm, so they fit the same tray.

### Fulmen FC904 or FC905: what is the difference?

Only the polarity: the FC904 has the positive terminal on the right and the FC905 the positive terminal on the left. Capacity (90 Ah), cranking power and dimensions are identical.

### Can the Fulmen FC904 be used in a car with Start-Stop?

No. The FC904 is a lead-acid battery for cars without automatic engine stop; Start-Stop needs an EFB or an AGM.

### How much does the Fulmen FC904 weigh?

19.9 kg, with 90 Ah of capacity. For reference, the Fulmen FA954 (95 Ah) weighs 21.4 kg.

### Which battery is equivalent to the Fulmen FC904?

With the same dimensions, polarity and similar capacity you have the Exide EC904, Tudor TC904 and Deta DC904. As the FC904 is a conventional battery, an EFB or AGM of the same size also works.

### What case size is the Fulmen FC904?

Case size D31: 306 × 173 × 222 mm. The FC904 fits any standard D31 battery tray such as the Exide EC904.

## More batteries to compare with the FC904

- [More car batteries](https://bateriasonline.es/en/car-batteries)
- [More Fulmen models](https://bateriasonline.es/en/fulmen-batteries)
- [Varta G7](https://bateriasonline.es/en/varta-g7) · 95 Ah, 830 A, 306×173×225 mm

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