# Fulmen FA852 · Car battery 12V 85Ah 800A

![Fulmen FA852 · Car battery 12V 85Ah 800A](https://bateriasonline.es/2884-home_default/fulmen-fa852.jpg)

> Fulmen FA852: 85 Ah car battery, 800 A (EN), 315×175×175 mm, positive terminal on the right, LB4 case. Equivalent to Exide EA852 and Tudor TA852.

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

- **Canonical URL**: https://bateriasonline.es/en/fulmen-fa852
- **Language**: en
- **Brand**: Fulmen
- **Reference**: BOL-FULMEN-FA852
- **EAN**: 3661024044295
- **MPN**: FA852
- **Last updated**: 2026-11-06

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Fulmen |
| Range | FULMEN Formula Xtreme |
| Application | Cars |
| Technology | Lead-acid |
| Voltage | 12 V |
| Capacity | 85 Ah |
| Cold cranking amps (EN) | 800 A |
| Length | 315 mm |
| Width | 175 mm |
| Height | 175 mm |
| Weight | 18.6 kg |
| Polarity | Positive terminal on the right |
| Case size | LB4 (315 × 175 × 175 mm) |

## Quick description

The Fulmen FA852 is a car battery with 12 V, 85 Ah and 800 A cold cranking current, case size LB4 (315 × 175 × 175 mm), with the positive terminal on the right.

## Description

## Where the Fulmen FA852 fits

The Fulmen FA852 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 FA852 covers the daily routine of a car without automatic engine stop: cold starts, short trips and loads with the ignition off.
At 85 Ah it moves into large diesels, SUVs, vans and cars with heavy electrical equipment. The FA852 belongs to the Fulmen FULMEN Formula Xtreme range. [The full range of Fulmen batteries](https://bateriasonline.es/en/fulmen-batteries)

## Fulmen FA852 vs FB802, FK820 and FL752: which one to choose?

How the FA852 compares with Fulmen batteries of similar size and capacity:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Fulmen FA852 (this one) | 85 Ah | 800 A | 315 × 175 × 175 | right | 18.6 kg |
| Fulmen FB802 | 80 Ah | 700 A | 315 × 175 × 175 | right | 17.8 kg |
| Fulmen FK820 | 82 Ah | 800 A | 315 × 175 × 190 | right | 23.3 kg |
| Fulmen FL752 | 75 Ah | 730 A | 315 × 175 × 175 | right | 18.6 kg |

- Fulmen FB802: 5 Ah less, 100 A less cranking power, the same LB4 case.
- Fulmen FK820: 3 Ah less, the same cranking power, a different height (190 mm instead of 175 mm, L4), AGM technology. It only fits if there is room for 190 mm of height.
- Fulmen FL752: 10 Ah less, 70 A less cranking power, the same LB4 case, EFB technology.

## Part numbers and codes for the Fulmen FA852

Look for any of these FA852 codes on your current battery or in the manufacturer's catalogue:

| Commercial reference | FA852 |
|---|---|
| EAN | 3661024044295 |
| Case size (EN) | LB4 |
| Not to be confused with | Fulmen FB852 (85 Ah, 760 A) |

## Equivalents and alternatives to the Fulmen FA852

Batteries that fit the FA852's tray with the same polarity; besides other conventional batteries, an EFB or AGM of this size is a valid upgrade for the FA852.

| Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Exide EA852 | Lead-acid | 85 Ah | 800 A | 315 × 175 × 175 |
| Varta F18 | Lead-acid | 85 Ah | 800 A | 315 × 175 × 175 |
| Tudor TA852 | Lead-acid | 85 Ah | 800 A | 315 × 175 × 175 |
| Deta DA852 | Lead-acid | 85 Ah | 800 A | 315 × 175 × 175 |
| Varta F17 | Lead-acid | 80 Ah | 740 A | 315 × 175 × 175 |
| Kronobat PB-80.0B | Lead-acid | 80 Ah | 740 A | 315 × 175 × 175 |

Its Bosch equivalent is the Bosch S5 010, the same as for the Varta F18. Bosch is not part of our catalogue; we list it so you can compare.

## Before ordering the FA852, check this

- Measure the space: the FA852 takes up 315 × 175 × 175 mm (European case size LB4).
- With the terminals facing you, the positive terminal of the FA852 is on the right.
- Your current battery should say about 85 Ah; a little more is also fine.
- The FA852 delivers 800 A cold cranking (EN standard); do not go below what your original battery states.
- If your car has Start-Stop, the FA852 is not the right one: it needs an EFB or an AGM.

## What it means that the FA852 is lead-acid

The FA852 is a conventional lead-acid battery, with plates immersed in liquid electrolyte. In cars without energy management, the FA852 needs no special registration: just connect it.

## Frequently asked questions about the Fulmen FA852

### FA852 or FB802: which one suits me?

Compared with the FA852, the Fulmen FB802 has 5 Ah less and 100 A less cranking power. The FA852 cranks harder; the FB802 is only a good option if your original battery says 700 A or less. Both measure 315 × 175 × 175 mm, so they fit the same tray.

### Fulmen FA852 or FK820: what changes?

Mainly the height: the FA852 is 175 mm tall (LB4) and the Fulmen FK820 190 mm (L4), with the same length and width. In capacity and cranking power, the FK820 offers 82 Ah and 800 A against 85 Ah and 800 A. Before choosing between the FA852 and the FK820, measure the free height of the battery compartment with the cover or bonnet closed.

### Can the Fulmen FA852 be used in a car with Start-Stop?

No. The FA852 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 FL752.

### How much does the Fulmen FA852 weigh?

18.6 kg, with 85 Ah of capacity. For reference, the Fulmen FB802 (80 Ah) weighs 17.8 kg.

### Which battery is equivalent to the Fulmen FA852?

With the same dimensions, polarity and similar capacity you have the Exide EA852, Varta F18 and Tudor TA852. As the FA852 is a conventional battery, an EFB or AGM of the same size also works. Its Bosch equivalent is the Bosch S5 010, the same as for the Varta F18. Bosch is not part of our catalogue; we list it so you can compare.

### What case size is the Fulmen FA852?

Case size LB4: 315 × 175 × 175 mm. The FA852 fits any standard LB4 battery tray such as the Exide EA852.

### Which side is the positive terminal on the Fulmen FA852?

On the FA852, 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 FA852

- [All car batteries](https://bateriasonline.es/en/car-batteries)
- [The whole Fulmen range](https://bateriasonline.es/en/fulmen-batteries)
- [Exide EA852](https://bateriasonline.es/en/exide-ea852) · 85 Ah, 800 A, 315×175×175 mm
- [Varta F18](https://bateriasonline.es/en/varta-f18) · 85 Ah, 800 A, 315×175×175 mm

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