# Fulmen FD851T · Truck battery 12V 85Ah 350A

![Fulmen FD851T · Truck battery 12V 85Ah 350A](https://bateriasonline.es/2702-home_default/fulmen-fd851t.jpg)

> Fulmen FD851T: 85 Ah truck battery, 350 A (EN), 349×175×235 mm, positive terminal on the left, GEL. Equivalent to Exide ED851T and Deta DD851T.

**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-fd851t
- **Language**: en
- **Brand**: Fulmen
- **Reference**: BOL-FULMEN-FD851T
- **EAN**: 3661024047388
- **MPN**: FD851T
- **Last updated**: 2026-11-06

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Fulmen |
| Range | FULMEN Endurance+PRO Gel |
| Application | Trucks and commercial vehicles |
| Technology | GEL |
| Voltage | 12 V |
| Capacity | 85 Ah |
| Cold cranking amps (EN) | 350 A |
| Length | 349 mm |
| Width | 175 mm |
| Height | 235 mm |
| Weight | 29.5 kg |
| Polarity | Positive terminal on the left |

## Quick description

Fulmen FD851T: truck battery with 12 V, 85 Ah and 350 A cold cranking current, measuring 349 × 175 × 235 mm, with the positive terminal on the left.

## Description

## Where the Fulmen FD851T fits

The Fulmen FD851T 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. It is built to resist constant vibration and long shifts.
The FD851T belongs to the Fulmen FULMEN Endurance+PRO Gel range. [The full range of Fulmen batteries](https://bateriasonline.es/en/fulmen-batteries)

## Equivalents and alternatives to the Fulmen FD851T

Gel alternatives to the FD851T, with the same size and polarity: a gel charger does not treat an AGM or a flooded battery the same way.

| Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Exide ED851T | GEL | 85 Ah | 350 A | 349 × 175 × 235 |
| Deta DD851T | GEL | 85 Ah | 350 A | 349 × 175 × 235 |

## What it means that the FD851T is GEL

The FD851T is a gel battery: the electrolyte is immobilised in silica gel. It requires a charger with a specific gel profile.

## Before ordering the FD851T, check this

- Measure the space: the FD851T takes up 349 × 175 × 235 mm.
- With the terminals facing you, the positive terminal of the FD851T is on the left.
- Your current battery should say about 85 Ah; a little more is also fine.
- Check the EN amps on your battery: if it says 350 A or less, the FD851T covers your engine.

## Part numbers and codes for the Fulmen FD851T

The FD851T is listed under these codes on labels, in garages and in catalogues:

| Commercial reference | FD851T |
|---|---|
| EAN | 3661024047388 |

## Frequently asked questions about the Fulmen FD851T

### How much does the Fulmen FD851T weigh?

29.5 kg, with 85 Ah of capacity.

### Which battery is equivalent to the Fulmen FD851T?

For the FD851T, other gel batteries with its size and polarity: Exide ED851T and Deta DD851T.

### What is the cold cranking current of the Fulmen FD851T?

350 A to the EN standard, with 85 Ah capacity.

### Which side is the positive terminal on the Fulmen FD851T?

On the FD851T, the positive terminal is on the left 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 FD851T

- [More truck, commercial and agricultural vehicle batteries](https://bateriasonline.es/en/truck-agricultural-batteries)
- [The whole Fulmen range](https://bateriasonline.es/en/fulmen-batteries)
- [Exide ED851T](https://bateriasonline.es/en/exide-ed851t) · 85 Ah, 350 A, 349×175×235 mm
- [Deta DD851T](https://bateriasonline.es/en/deta-dd851t) · 85 Ah, 350 A, 349×175×235 mm

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