# Fulmen FJ1000 · Truck battery 12V 100Ah 850A

![Fulmen FJ1000 · Truck battery 12V 100Ah 850A](https://bateriasonline.es/2726-home_default/fulmen-fj1000.jpg)

> Fulmen FJ1000: 100 Ah truck battery, 850 A (EN), 353×175×190 mm, positive terminal on the right, L5 case. Equivalent to Exide EJ1000 and Deta DJ1000.

**Category:** [Truck, commercial and agricultural vehicle batteries](https://bateriasonline.es/en/truck-agricultural-batteries) → [Fulmen](https://bateriasonline.es/en/fulmen-batteries)

- **Canonical URL**: https://bateriasonline.es/en/fulmen-fj1000
- **Language**: en
- **Brand**: Fulmen
- **Reference**: BOL-FULMEN-FJ1000
- **EAN**: 3661024046671
- **MPN**: FJ1000
- **Last updated**: 2026-11-06

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Fulmen |
| Range | FULMEN PowerPRO Agricultura y Construccion |
| Application | Trucks and commercial vehicles |
| Technology | Lead-acid |
| Voltage | 12 V |
| Capacity | 100 Ah |
| Cold cranking amps (EN) | 850 A |
| Length | 353 mm |
| Width | 175 mm |
| Height | 190 mm |
| Weight | 21.8 kg |
| Polarity | Positive terminal on the right |
| Case size | L5 (353 × 175 × 190 mm) |

## Quick description

The Fulmen FJ1000 is a truck battery with 12 V, 100 Ah and 850 A cold cranking current, case size L5 (353 × 175 × 190 mm), with the positive terminal on the right.

## Description

## The Fulmen FJ1000 at a glance

The Fulmen FJ1000 is a starter battery for trucks, tractors and machinery: high capacity, robust terminals and a build that withstands vibration and the starts of large engines. The FJ1000 is fitted alone or in pairs, in series, for the 24 V system of many trucks.
The FJ1000 belongs to the Fulmen FULMEN PowerPRO Agricultura y Construccion range. [More Fulmen batteries](https://bateriasonline.es/en/fulmen-batteries)

## Equivalents and alternatives to the Fulmen FJ1000

Batteries that fit the FJ1000's tray with the same polarity; besides other conventional batteries, an EFB or AGM of this size is a valid upgrade for the FJ1000.

| Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Exide EJ1000 | Lead-acid | 100 Ah | 850 A | 353 × 175 × 190 |
| Deta DJ1000 | Lead-acid | 100 Ah | 850 A | 353 × 175 × 190 |

## Fulmen FJ1000 vs FJ1100 and FJ1102: differences

How the FJ1000 compares with Fulmen batteries of similar size and capacity:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Fulmen FJ1000 (this one) | 100 Ah | 850 A | 353 × 175 × 190 | right | 21.8 kg |
| Fulmen FJ1100 | 110 Ah | 900 A | 349 × 175 × 235 | right | 28.3 kg |
| Fulmen FJ1102 | 110 Ah | 900 A | 349 × 175 × 235 | right | 28.3 kg |

- Fulmen FJ1100: 10 Ah more, 50 A more cranking power, a different case (349 × 175 × 235 mm).
- Fulmen FJ1102: 10 Ah more, 50 A more cranking power, a different case (349 × 175 × 235 mm).

## What it means that the FJ1000 is lead-acid

The FJ1000 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.

## Before ordering the FJ1000, check this

- The FJ1000 needs 353 × 175 × 190 mm of space (European case size L5): measure it with the hold-down clamp in place.
- Polarity of the FJ1000: positive terminal on the right (if yours has it on the other side, the cables will not reach).
- With 100 Ah, the FJ1000 replaces an original battery of that capacity or slightly less.
- Check the EN amps on your battery: if it says 850 A or less, the FJ1000 covers your engine.

## Part numbers and codes for the Fulmen FJ1000

The FJ1000 is listed under these codes on labels, in garages and in catalogues:

| Commercial reference | FJ1000 |
|---|---|
| EAN | 3661024046671 |
| Case size (EN) | L5 |
| Not to be confused with | Fulmen FL1000 (100 Ah, 900 A), Fulmen FJ1100 (110 Ah, 900 A), Fulmen FA1000 (100 Ah, 900 A) |

## Frequently asked questions about the Fulmen FJ1000

### FJ1000 or FJ1100: which one suits me?

Compared with the FJ1000, the Fulmen FJ1100 has 10 Ah more and 50 A more cranking power. If your current battery says 900 A or more, choose the FJ1100; if it says 850 A or less, the FJ1000 is enough. Mind the space: the FJ1100 measures 349 × 175 × 235 mm.

### How much does the Fulmen FJ1000 weigh?

21.8 kg, with 100 Ah of capacity. For reference, the Fulmen FJ1100 (110 Ah) weighs 28.3 kg.

### Which battery is equivalent to the Fulmen FJ1000?

With the same dimensions, polarity and similar capacity you have the Exide EJ1000 and Deta DJ1000. As the FJ1000 is a conventional battery, an EFB or AGM of the same size also works.

### What case size is the Fulmen FJ1000?

Case size L5: 353 × 175 × 190 mm. The FJ1000 fits any standard L5 battery tray such as the Exide EJ1000.

### Which side is the positive terminal on the Fulmen FJ1000?

On the FJ1000, the positive terminal is on the right with the terminals facing you: compare it with your current battery, because with reversed polarity the cables will not reach.

## Other options if you are unsure about the FJ1000

- [More truck, commercial and agricultural vehicle batteries](https://bateriasonline.es/en/truck-agricultural-batteries)
- [Full Fulmen catalogue](https://bateriasonline.es/en/fulmen-batteries)
- [Exide EJ1000](https://bateriasonline.es/en/exide-ej1000) · 100 Ah, 850 A, 353×175×190 mm
- [Deta DJ1000](https://bateriasonline.es/en/deta-dj1000) · 100 Ah, 850 A, 353×175×190 mm

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