# Fulbat F50-N18L-A / 12N18-3A · Motorcycle battery 12V 21.1Ah 260A

![Fulbat F50-N18L-A / 12N18-3A · Motorcycle battery 12V 21.1Ah 260A](https://bateriasonline.es/400-home_default/fulbat-f50-n18l-a-12n18-3a.jpg)

> Fulbat F50-N18L-A / 12N18-3A: 21.1 Ah motorcycle battery, 260 A (EN), 205×90×162 mm, positive terminal on the right. Equivalent to Exide E50-N18L-A.

**Category:** [Motorcycle batteries](https://bateriasonline.es/en/motorcycle-batteries) → [Fulbat](https://bateriasonline.es/en/fulbat-batteries)

- **Canonical URL**: https://bateriasonline.es/en/fulbat-f50-n18l-a-12n18-3a
- **Language**: en
- **Brand**: Fulbat
- **Reference**: BOL-FULBAT-F50-N18L-A / 12N18-3A
- **MPN**: F50-N18L-A / 12N18-3A
- **Last updated**: 2026-11-06

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Fulbat |
| Range | FULBAT Motorcycle DRY |
| Application | Motorcycles |
| Technology | Lead-acid |
| Voltage | 12 V |
| Capacity | 21.1 Ah |
| Cold cranking amps (EN) | 260 A |
| Length | 205 mm |
| Width | 90 mm |
| Height | 162 mm |
| Weight | 5.95 kg |
| Polarity | Positive terminal on the right |

## Quick description

The Fulbat F50-N18L-A / 12N18-3A is a motorcycle battery with 12 V, 21.1 Ah and 260 A cold cranking current, measuring 205 × 90 × 162 mm, with the positive terminal on the right.

## Description

## The Fulbat F50-N18L-A / 12N18-3A at a glance

The Fulbat F50-N18L-A / 12N18-3A is made for motorcycles, scooters and quads. It is worth keeping the F50-N18L-A / 12N18-3A on a maintenance charger if the bike is laid up over winter.
At 21.1 Ah it is a large battery for heavy motorcycles, jet skis and utility quads. The F50-N18L-A / 12N18-3A belongs to the Fulbat FULBAT Motorcycle DRY range. [More Fulbat batteries](https://bateriasonline.es/en/fulbat-batteries)

## Equivalents and alternatives to the Fulbat F50-N18L-A / 12N18-3A

Same dimensions and polarity as the F50-N18L-A / 12N18-3A, with similar capacity and cranking power; as a conventional battery, the F50-N18L-A / 12N18-3A can also be replaced by an EFB or AGM of the same size if you want more cycles.

| Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Varta SY50-N18L-AT | Lead-acid | 20 Ah | 260 A | 205 × 90 × 162 |
| Exide E50-N18L-A | Lead-acid | 20 Ah | 260 A | 205 × 90 × 165 |
| Exide E50-N18L-A3 | Lead-acid | 20 Ah | 260 A | 205 × 90 × 165 |
| Varta Y50-N18L-A | Lead-acid | 20 Ah | 260 A | 207 × 92 × 164 |
| Fulbat F50-N18L-A3 | Lead-acid | 21.1 Ah | 260 A | 205 × 90 × 162 |

## Fulbat F50-N18L-A vs FTX24HL-BS and FB16AL-A2: which one to choose?

Torn between the F50-N18L-A / 12N18-3A and another similar Fulbat? This is what changes:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Fulbat F50-N18L-A / 12N18-3A (this one) | 21.1 Ah | 260 A | 205 × 90 × 162 | right | 5.95 kg |
| Fulbat FTX24HL-BS | 22.1 Ah | 350 A | 205 × 87 × 162 | right | 7.34 kg |
| Fulbat FB16AL-A2 | 16.8 Ah | 210 A | 207 × 71 × 164 | right | 5.78 kg |

- Fulbat FTX24HL-BS: 1 Ah more, 90 A more cranking power, a different case (205 × 87 × 162 mm), AGM technology.
- Fulbat FB16AL-A2: 4.30 Ah less, 50 A less cranking power, a different case (207 × 71 × 164 mm).

## What to look at before buying the F50-N18L-A / 12N18-3A

- The F50-N18L-A / 12N18-3A needs 205 × 90 × 162 mm of space: measure it with the hold-down clamp in place.
- With the terminals facing you, the positive terminal of the F50-N18L-A / 12N18-3A is on the right.
- Capacity of the F50-N18L-A / 12N18-3A: 21.1 Ah; the same as your current battery or slightly more is fine.
- Cold cranking: 260 A (EN), equal to or higher than the original.

## Frequently asked questions about the Fulbat F50-N18L-A / 12N18-3A

### Fulbat F50-N18L-A / 12N18-3A or FTX24HL-BS?

Compared with the F50-N18L-A / 12N18-3A, the Fulbat FTX24HL-BS has 1 Ah more, 90 A more cranking power and AGM technology. If your current battery says 350 A or more, choose the FTX24HL-BS; if it says 260 A or less, the F50-N18L-A / 12N18-3A is enough. Mind the space: the FTX24HL-BS measures 205 × 87 × 162 mm.

### How much does the Fulbat F50-N18L-A / 12N18-3A weigh?

The F50-N18L-A / 12N18-3A weighs 5.95 kg. For reference, the Fulbat FTX24HL-BS (22.1 Ah) weighs 7.34 kg.

### Which battery is equivalent to the Fulbat F50-N18L-A / 12N18-3A?

With the same dimensions, polarity and similar capacity you have the Varta SY50-N18L-AT, Exide E50-N18L-A and Exide E50-N18L-A3. As the F50-N18L-A / 12N18-3A is a conventional battery, an EFB or AGM of the same size also works.

### Which side is the positive terminal on the Fulbat F50-N18L-A / 12N18-3A?

The F50-N18L-A / 12N18-3A has the positive terminal on the right, looking at the battery from its long side with the terminals closest to you.

### Does the Fulbat F50-N18L-A / 12N18-3A come charged and ready to fit?

Sealed AGM and gel batteries leave the factory charged and ready. Conventional ones with a separate acid pack are activated when filled and should be charged before fitting.

## Inside the F50-N18L-A / 12N18-3A: lead-acid technology

Inside, the F50-N18L-A / 12N18-3A 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.

## Other options if you are unsure about the F50-N18L-A / 12N18-3A

- [More motorcycle batteries](https://bateriasonline.es/en/motorcycle-batteries)
- [The whole Fulbat range](https://bateriasonline.es/en/fulbat-batteries)
- [Varta SY50-N18L-AT](https://bateriasonline.es/en/varta-sy50-n18l-at-520016026) · 20 Ah, 260 A, 205×90×162 mm
- [Exide E50-N18L-A](https://bateriasonline.es/en/exide-e50-n18l-a) · 20 Ah, 260 A, 205×90×165 mm

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