# Fulmen FA900 · Car battery 12V 90Ah 720A

![Fulmen FA900 · Car battery 12V 90Ah 720A](https://bateriasonline.es/2887-home_default/fulmen-fa900.jpg)

> Fulmen FA900: 90 Ah car battery, 720 A (EN), 315×175×190 mm, positive terminal on the right, L4 case. Equivalent to Exide EA900 and Tudor TA900.

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

- **Canonical URL**: https://bateriasonline.es/en/fulmen-fa900
- **Language**: en
- **Brand**: Fulmen
- **Reference**: BOL-FULMEN-FA900
- **EAN**: 3661024046251
- **MPN**: FA900
- **Last updated**: 2026-10-27

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Fulmen |
| Range | FULMEN Formula Xtreme |
| Application | Cars |
| Technology | Lead-acid |
| Voltage | 12 V |
| Capacity | 90 Ah |
| Cold cranking amps (EN) | 720 A |
| Length | 315 mm |
| Width | 175 mm |
| Height | 190 mm |
| Weight | 19.5 kg |
| Polarity | Positive terminal on the right |
| Case size | L4 (315 × 175 × 190 mm) |

## Quick description

Fulmen FA900: car battery with 12 V, 90 Ah and 720 A cold cranking current, case size L4 (315 × 175 × 190 mm), with the positive terminal on the right.

## Description

## Who the Fulmen FA900 is for

The Fulmen FA900 is made for petrol and diesel cars without automatic engine stop. The FA900 covers the daily routine of a car without automatic engine stop: cold starts, short trips and loads with the ignition off.
At 90 Ah it moves into large diesels, SUVs, vans and cars with heavy electrical equipment. The FA900 belongs to the Fulmen FULMEN Formula Xtreme range. [More Fulmen batteries](https://bateriasonline.es/en/fulmen-batteries)

## Part numbers and codes for the Fulmen FA900

Shops, garages and catalogues identify the FA900 with these codes:

| Commercial reference | FA900 |
|---|---|
| EAN | 3661024046251 |
| Case size (EN) | L4 |
| Not to be confused with | Fulmen FC900 (90 Ah, 720 A) |

## Fulmen FA900 vs FB800 and FK820: which one to choose?

What sets the FA900 apart from its neighbours in the Fulmen range:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Fulmen FA900 (this one) | 90 Ah | 720 A | 315 × 175 × 190 | right | 19.5 kg |
| Fulmen FB800 | 80 Ah | 640 A | 315 × 175 × 190 | right | 19 kg |
| Fulmen FK820 | 82 Ah | 800 A | 315 × 175 × 190 | right | 23.3 kg |

- Fulmen FB800: 10 Ah less, 80 A less cranking power, the same L4 case.
- Fulmen FK820: 8 Ah less, 80 A more cranking power, the same L4 case, AGM technology.

## Equivalents and alternatives to the Fulmen FA900

Batteries that fit the FA900's tray with the same polarity; besides other conventional batteries, an EFB or AGM of this size is a valid upgrade for the FA900.

| Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Exide EA900 | Lead-acid | 90 Ah | 720 A | 315 × 175 × 190 |
| Tudor TA900 | Lead-acid | 90 Ah | 720 A | 315 × 175 × 190 |
| Deta DA900 | Lead-acid | 90 Ah | 720 A | 315 × 175 × 190 |
| Varta F19 | Lead-acid | 85 Ah | 800 A | 315 × 175 × 190 |
| Kronobat MS-85.0 | Lead-acid | 85 Ah | 800 A | 315 × 175 × 190 |

## What it means that the FA900 is lead-acid

Inside, the FA900 is classic lead-acid: liquid electrolyte and lead plates. It is a robust, well-known technology with a good capacity-to-price ratio, and still the basis of most cars, trucks and traction equipment.

## What to look at before buying the FA900

- If your car has Start-Stop, the FA900 is not the right one: it needs an EFB or an AGM.
- The FA900 delivers 720 A cold cranking (EN standard); do not go below what your original battery states.
- With 90 Ah, the FA900 replaces an original battery of that capacity or slightly less.
- Polarity of the FA900: positive terminal on the right (if yours has it on the other side, the cables will not reach).
- The FA900 needs 315 × 175 × 190 mm of space (European case size L4): measure it with the hold-down clamp in place.

## Frequently asked questions about the Fulmen FA900

### FA900 or FB800: which one suits me?

Compared with the FA900, the Fulmen FB800 has 10 Ah less and 80 A less cranking power. The FA900 cranks harder; the FB800 is only a good option if your original battery says 640 A or less. Both measure 315 × 175 × 190 mm, so they fit the same tray.

### Can the Fulmen FA900 be used in a car with Start-Stop?

No. The FA900 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 FK820.

### How much does the Fulmen FA900 weigh?

19.5 kg, with 90 Ah of capacity. For reference, the Fulmen FB800 (80 Ah) weighs 19 kg.

### Which battery is equivalent to the Fulmen FA900?

With the same dimensions, polarity and similar capacity you have the Exide EA900, Tudor TA900 and Deta DA900. As the FA900 is a conventional battery, an EFB or AGM of the same size also works.

### What case size is the Fulmen FA900?

Case size L4: 315 × 175 × 190 mm. The FA900 fits any standard L4 battery tray such as the Exide EA900.

### Which side is the positive terminal on the Fulmen FA900?

On the FA900, 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.

### Which charger does the Fulmen FA900 need?

An automatic lead-acid charger with cut-off or maintenance mode, rated at 10 to 20% of its capacity in amps. If it is a vented type, check the electrolyte level and top up only with distilled water.

## Other options if you are unsure about the FA900

- [Other car batteries](https://bateriasonline.es/en/car-batteries)
- [Full Fulmen catalogue](https://bateriasonline.es/en/fulmen-batteries)
- [Exide EA900](https://bateriasonline.es/en/exide-ea900) · 90 Ah, 720 A, 315×175×190 mm
- [Tudor TA900](https://bateriasonline.es/en/tudor-ta900) · 90 Ah, 720 A, 315×175×190 mm

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