# Fulmen FB800 · Car battery 12V 80Ah 640A

![Fulmen FB800 · Car battery 12V 80Ah 640A](https://bateriasonline.es/2976-home_default/fulmen-fb800.jpg)

> Fulmen FB800: 80 Ah car battery, 640 A (EN), 315×175×190 mm, positive terminal on the right, L4 case. Equivalent to Exide EB800 and Tudor TB800.

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

- **Canonical URL**: https://bateriasonline.es/en/fulmen-fb800
- **Language**: en
- **Brand**: Fulmen
- **Reference**: BOL-FULMEN-FB800
- **EAN**: 3661024046244
- **MPN**: FB800
- **Last updated**: 2026-11-06

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Fulmen |
| Range | FULMEN Formula |
| Application | Cars |
| Technology | Lead-acid |
| Voltage | 12 V |
| Capacity | 80 Ah |
| Cold cranking amps (EN) | 640 A |
| Length | 315 mm |
| Width | 175 mm |
| Height | 190 mm |
| Weight | 19 kg |
| Polarity | Positive terminal on the right |
| Case size | L4 (315 × 175 × 190 mm) |

## Quick description

Fulmen FB800: car battery with 12 V, 80 Ah and 640 A cold cranking current, case size L4 (315 × 175 × 190 mm), with the positive terminal on the right.

## Description

## Who the Fulmen FB800 is for

The Fulmen FB800 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. The FB800 covers the daily routine of a car without automatic engine stop: cold starts, short trips and loads with the ignition off.
At 80 Ah it sits in the range of compact and mid-size diesels, SUVs and MPVs. The FB800 belongs to the Fulmen FULMEN Formula range. [See all Fulmen batteries](https://bateriasonline.es/en/fulmen-batteries)

## Fulmen FB800 vs FK800, FB802 and FL800: which one to choose?

The real differences between the FB800 and the closest Fulmen models:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Fulmen FB800 (this one) | 80 Ah | 640 A | 315 × 175 × 190 | right | 19 kg |
| Fulmen FK800 | 80 Ah | 800 A | 315 × 175 × 190 | right | 23.1 kg |
| Fulmen FB802 | 80 Ah | 700 A | 315 × 175 × 175 | right | 17.8 kg |
| Fulmen FL800 | 80 Ah | 800 A | 315 × 175 × 190 | right | 22.1 kg |

- Fulmen FK800: the same capacity, 160 A more cranking power, the same L4 case, AGM technology.
- Fulmen FB802: the same capacity, 60 A more cranking power, a different height (175 mm instead of 190 mm, LB4). It is the option if your battery tray cannot take the 190 mm height of the FB800.
- Fulmen FL800: the same capacity, 160 A more cranking power, the same L4 case, EFB technology.

## Fulmen FB800 codes and part numbers

The FB800 is listed under these codes on labels, in garages and in catalogues:

| Commercial reference | FB800 |
|---|---|
| EAN | 3661024046244 |
| Case size (EN) | L4 |
| Not to be confused with | Fulmen FK800 (80 Ah, 800 A), Fulmen FL800 (80 Ah, 800 A), Fulmen FB500 (50 Ah, 450 A) |

## Equivalents and alternatives to the Fulmen FB800

Same dimensions and polarity as the FB800, with similar capacity and cranking power; as a conventional battery, the FB800 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 EB800 | Lead-acid | 80 Ah | 640 A | 315 × 175 × 190 |
| Tudor TB800 | Lead-acid | 80 Ah | 640 A | 315 × 175 × 190 |
| Deta DB800 | Lead-acid | 80 Ah | 640 A | 315 × 175 × 190 |
| Varta F16 | Lead-acid | 80 Ah | 740 A | 315 × 175 × 190 |
| Kronobat PB-80.0 | Lead-acid | 80 Ah | 740 A | 315 × 175 × 190 |

## Before ordering the FB800, check this

- Length, width and height of the FB800: 315 × 175 × 190 mm (European case size L4).
- With the terminals facing you, the positive terminal of the FB800 is on the right.
- Capacity of the FB800: 80 Ah; the same as your current battery or slightly more is fine.
- Check the EN amps on your battery: if it says 640 A or less, the FB800 covers your engine.
- If your car has Start-Stop, the FB800 is not the right one: it needs an EFB or an AGM.

## Inside the FB800: lead-acid technology

The FB800 is a conventional lead-acid battery, with plates immersed in liquid electrolyte. Avoid leaving them discharged, as they sulphate, and charge them with a charger that cuts off or switches to maintenance when finished.

## Frequently asked questions about the Fulmen FB800

### Fulmen FB800 or FK800?

Compared with the FB800, the Fulmen FK800 has 160 A more cranking power and AGM technology. If your current battery says 800 A or more, choose the FK800; if it says 640 A or less, the FB800 is enough. Both measure 315 × 175 × 190 mm, so they fit the same tray.

### Fulmen FB800 or FB802: what changes?

Mainly the height: the FB800 is 190 mm tall (L4) and the Fulmen FB802 175 mm (LB4), with the same length and width. In capacity and cranking power, the FB802 offers 80 Ah and 700 A against 80 Ah and 640 A. Before choosing between the FB800 and the FB802, measure the free height of the battery compartment with the cover or bonnet closed.

### Can the Fulmen FB800 be used in a car with Start-Stop?

No. The FB800 is a lead-acid battery for cars without automatic engine stop; Start-Stop needs an EFB or an AGM; in this same size there is the Fulmen FK800.

### How much does the Fulmen FB800 weigh?

The FB800 weighs 19 kg. For reference, the Fulmen FK800 (80 Ah) weighs 23.1 kg.

### Which battery is equivalent to the Fulmen FB800?

With the same dimensions, polarity and similar capacity you have the Exide EB800, Tudor TB800 and Deta DB800. As the FB800 is a conventional battery, an EFB or AGM of the same size also works.

### What case size is the Fulmen FB800?

Case size L4: 315 × 175 × 190 mm. The FB800 fits any standard L4 battery tray such as the Exide EB800.

### Which side is the positive terminal on the Fulmen FB800?

The FB800 has the positive terminal on the right, looking at the battery from its long side with the terminals closest to you.

## Keep comparing: alternatives to the FB800

- [All car batteries](https://bateriasonline.es/en/car-batteries)
- [Full Fulmen catalogue](https://bateriasonline.es/en/fulmen-batteries)
- [Exide EB800](https://bateriasonline.es/en/exide-eb800) · 80 Ah, 640 A, 315×175×190 mm
- [Tudor TB800](https://bateriasonline.es/en/tudor-tb800) · 80 Ah, 640 A, 315×175×190 mm

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