# Fulmen FB504 · Car battery 12V 50Ah 360A

![Fulmen FB504 · Car battery 12V 50Ah 360A](https://bateriasonline.es/2941-home_default/fulmen-fb504.jpg)

> Fulmen FB504: 50 Ah car battery, 360 A (EN), 200×173×222 mm, positive terminal on the right. Equivalent to Exide EB504 and Tudor TB504.

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

- **Canonical URL**: https://bateriasonline.es/en/fulmen-fb504
- **Language**: en
- **Brand**: Fulmen
- **Reference**: BOL-FULMEN-FB504
- **EAN**: 3661024044400
- **MPN**: FB504
- **Last updated**: 2026-10-27

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Fulmen |
| Range | FULMEN Formula |
| Application | Cars |
| Technology | Lead-acid |
| Voltage | 12 V |
| Capacity | 50 Ah |
| Cold cranking amps (EN) | 360 A |
| Length | 200 mm |
| Width | 173 mm |
| Height | 222 mm |
| Weight | 12.9 kg |
| Polarity | Positive terminal on the right |

## Quick description

Fulmen FB504: car battery with 12 V, 50 Ah and 360 A cold cranking current, measuring 200 × 173 × 222 mm, with the positive terminal on the right. With the positive terminal on the left, the exact counterpart is the Fulmen FB505.

## Description

## Who the Fulmen FB504 is for

The Fulmen FB504 is a starter battery for cars without Start-Stop: it delivers the current the starter motor needs and then powers lights, control units and audio with the engine off. Its job is to start the engine in the cold with margin to spare and keep the car's electronics powered.
At 50 Ah it covers petrol compacts and small diesels, the best-selling format in Europe. The FB504 belongs to the Fulmen FULMEN Formula range. [The full range of Fulmen batteries](https://bateriasonline.es/en/fulmen-batteries)

## Fulmen FB504 codes and part numbers

Look for any of these FB504 codes on your current battery or in the manufacturer's catalogue:

| Commercial reference | FB504 |
|---|---|
| EAN | 3661024044400 |
| Not to be confused with | Fulmen FB500 (50 Ah, 450 A), Fulmen FB501 (50 Ah, 450 A, positive terminal on the left), Fulmen FB505 (50 Ah, 360 A, positive terminal on the left) |

## Fulmen FB504 vs FB604, FB505 and FB500: differences

The real differences between the FB504 and the closest Fulmen models:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Fulmen FB504 (this one) | 50 Ah | 360 A | 200 × 173 × 222 | right | 12.9 kg |
| Fulmen FB604 | 60 Ah | 480 A | 230 × 173 × 222 | right | 14.6 kg |
| Fulmen FB505 | 50 Ah | 360 A | 200 × 173 × 222 | left | 12.9 kg |
| Fulmen FB500 | 50 Ah | 450 A | 207 × 175 × 190 | right | 12.1 kg |

- Fulmen FB604: 10 Ah more, 120 A more cranking power, a different case (230 × 173 × 222 mm).
- Fulmen FB505: identical to the FB504 except for the positive terminal, which is on the other side (positive terminal on the left).
- Fulmen FB500: the same capacity, 90 A more cranking power, a different case (207 × 175 × 190 mm).

## Equivalents and alternatives to the Fulmen FB504

Same dimensions and polarity as the FB504, with similar capacity and cranking power; as a conventional battery, the FB504 can also be replaced by an EFB or AGM of the same size if you want more cycles.

| Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Exide EB504 | Lead-acid | 50 Ah | 360 A | 200 × 173 × 222 |
| Tudor TB504 | Lead-acid | 50 Ah | 360 A | 200 × 173 × 222 |
| Deta DB504 | Lead-acid | 50 Ah | 360 A | 200 × 173 × 222 |
| Long 50D20L | | 50 Ah | – | 202 × 173 × 225 |
| Long 50D20R | | 50 Ah | – | 202 × 173 × 225 |

## What it means that the FB504 is lead-acid

The FB504 is a conventional lead-acid battery, with plates immersed in liquid electrolyte. In cars without energy management, the FB504 needs no special registration: just connect it.

## Check this before ordering the Fulmen FB504

- If your car has Start-Stop, the FB504 is not the right one: it needs an EFB or an AGM.
- Check the EN amps on your battery: if it says 360 A or less, the FB504 covers your engine.
- With 50 Ah, the FB504 replaces an original battery of that capacity or slightly less.
- With the terminals facing you, the positive terminal of the FB504 is on the right.
- Length, width and height of the FB504: 200 × 173 × 222 mm.

## Frequently asked questions about the Fulmen FB504

### Fulmen FB504 or FB604?

Compared with the FB504, the Fulmen FB604 has 10 Ah more and 120 A more cranking power. If your current battery says 480 A or more, choose the FB604; if it says 360 A or less, the FB504 is enough. Mind the space: the FB604 measures 230 × 173 × 222 mm.

### What is the difference between the Fulmen FB504 and the FB505?

They are the same battery with the terminals swapped: positive terminal on the right on the FB504, positive terminal on the left on the FB505. Look at your current battery with the terminals facing you and pick the one that matches.

### Can the Fulmen FB504 be used in a car with Start-Stop?

No. The FB504 is a lead-acid battery for cars without automatic engine stop; Start-Stop needs an EFB or an AGM.

### How much does the Fulmen FB504 weigh?

The FB504 weighs 12.9 kg. For reference, the Fulmen FB604 (60 Ah) weighs 14.6 kg.

### Which battery is equivalent to the Fulmen FB504?

With the same dimensions, polarity and similar capacity you have the Exide EB504, Tudor TB504 and Deta DB504. As the FB504 is a conventional battery, an EFB or AGM of the same size also works.

### Which charger does the Fulmen FB504 need?

An automatic lead-acid charger with cut-off or maintenance mode, rated at 10 to 20% of its capacity in amps. If it is a vented type, check the electrolyte level and top up only with distilled water.

## Keep comparing: alternatives to the FB504

- [All car batteries](https://bateriasonline.es/en/car-batteries)
- [Full Fulmen catalogue](https://bateriasonline.es/en/fulmen-batteries)
- [Exide EB504](https://bateriasonline.es/en/exide-eb504) · 50 Ah, 360 A, 200×173×222 mm
- [Tudor TB504](https://bateriasonline.es/en/tudor-tb504) · 50 Ah, 360 A, 200×173×222 mm

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