# Fulmen FG1250 · Truck battery 12V 125Ah 760A

![Fulmen FG1250 · Truck battery 12V 125Ah 760A](https://bateriasonline.es/2766-home_default/fulmen-fg1250.jpg)

> Fulmen FG1250: 125 Ah truck battery, 760 A (EN), 349×175×285 mm, positive terminal on the right. Equivalent to Exide EG1250 and Exide EF1250.

**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-fg1250
- **Language**: en
- **Brand**: Fulmen
- **Reference**: BOL-FULMEN-FG1250
- **EAN**: 3661024045407
- **MPN**: FG1250
- **Last updated**: 2026-11-06

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Fulmen |
| Range | FULMEN StartPRO |
| Application | Trucks and commercial vehicles |
| Technology | Lead-acid |
| Voltage | 12 V |
| Capacity | 125 Ah |
| Cold cranking amps (EN) | 760 A |
| Length | 349 mm |
| Width | 175 mm |
| Height | 285 mm |
| Weight | 29.5 kg |
| Polarity | Positive terminal on the right |

## Quick description

Fulmen FG1250: truck battery with 12 V, 125 Ah and 760 A cold cranking current, measuring 349 × 175 × 285 mm, with the positive terminal on the right. If yours has the positive terminal on the left, you need the Fulmen FG1251.

## Description

## The Fulmen FG1250 at a glance

The Fulmen FG1250 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. With 125 Ah, the FG1250 suits heavy vehicles that had a battery of that capacity.
The FG1250 belongs to the Fulmen FULMEN StartPRO range. [More Fulmen batteries](https://bateriasonline.es/en/fulmen-batteries)

## Equivalents and alternatives to the Fulmen FG1250

Batteries that fit the FG1250's tray with the same polarity; besides other conventional batteries, an EFB or AGM of this size is a valid upgrade for the FG1250.

| Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Exide EG1250 | Lead-acid | 125 Ah | 760 A | 349 × 175 × 285 |
| Tudor TG1250 | Lead-acid | 125 Ah | 760 A | 349 × 175 × 285 |
| Deta DG1250 | Lead-acid | 125 Ah | 760 A | 349 × 175 × 285 |
| Varta J1 | Lead-acid | 125 Ah | 720 A | 349 × 175 × 285 |
| Exide EF1250 | Lead-acid | 125 Ah | 850 A | 349 × 175 × 285 |
| Tudor TF1250 | Lead-acid | 125 Ah | 850 A | 349 × 175 × 285 |

## Fulmen FG1250 vs FF1250, FG1251 and FF1202

The real differences between the FG1250 and the closest Fulmen models:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Fulmen FG1250 (this one) | 125 Ah | 760 A | 349 × 175 × 285 | right | 29.5 kg |
| Fulmen FF1250 | 125 Ah | 850 A | 349 × 175 × 285 | right | 31 kg |
| Fulmen FG1251 | 125 Ah | 760 A | 349 × 175 × 285 | left | 29.5 kg |
| Fulmen FF1202 | 120 Ah | 870 A | 349 × 175 × 235 | right | 27.5 kg |

- Fulmen FF1250: the same capacity, 90 A more cranking power, the same dimensions.
- If the positive terminal of your battery is on the other side, the one you need is the Fulmen FG1251 (positive terminal on the left).
- Fulmen FF1202: 5 Ah less, 110 A more cranking power, a different case (349 × 175 × 235 mm).

## What it means that the FG1250 is lead-acid

The FG1250 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.

## What to look at before buying the FG1250

- The FG1250 needs 349 × 175 × 285 mm of space: measure it with the hold-down clamp in place.
- Polarity of the FG1250: positive terminal on the right (if yours has it on the other side, the cables will not reach).
- With 125 Ah, the FG1250 replaces an original battery of that capacity or slightly less.
- Cold cranking: 760 A (EN), equal to or higher than the original.

## Part numbers and codes for the Fulmen FG1250

The FG1250 is listed under these codes on labels, in garages and in catalogues:

| Commercial reference | FG1250 |
|---|---|
| EAN | 3661024045407 |
| Not to be confused with | Fulmen FF1250 (125 Ah, 850 A), Fulmen FG1251 (125 Ah, 760 A, positive terminal on the left) |

## Frequently asked questions about the Fulmen FG1250

### FG1250 or FF1250: which one suits me?

Compared with the FG1250, the Fulmen FF1250 has 90 A more cranking power. If your current battery says 850 A or more, choose the FF1250; if it says 760 A or less, the FG1250 is enough. Both measure 349 × 175 × 285 mm, so they fit the same tray.

### Fulmen FG1250 or FG1251: what is the difference?

Only the polarity: the FG1250 has the positive terminal on the right and the FG1251 the positive terminal on the left. Capacity (125 Ah), cranking power and dimensions are identical.

### How much does the Fulmen FG1250 weigh?

29.5 kg, with 125 Ah of capacity. For reference, the Fulmen FF1250 (125 Ah) weighs 31 kg.

### Which battery is equivalent to the Fulmen FG1250?

With the same dimensions, polarity and similar capacity you have the Exide EG1250, Tudor TG1250 and Deta DG1250. As the FG1250 is a conventional battery, an EFB or AGM of the same size also works.

### Are truck batteries fitted in pairs?

Almost always, in series for 24 V. Replace them in matched pairs: mixing a new one with an old one unbalances charging and shortens the new one's life.

## Other options if you are unsure about the FG1250

- [All truck, commercial and agricultural vehicle batteries](https://bateriasonline.es/en/truck-agricultural-batteries)
- [Full Fulmen catalogue](https://bateriasonline.es/en/fulmen-batteries)
- [Exide EG1250](https://bateriasonline.es/en/exide-eg1250) · 125 Ah, 760 A, 349×175×285 mm
- [Tudor TG1250](https://bateriasonline.es/en/tudor-tg1250) · 125 Ah, 760 A, 349×175×285 mm

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