# Fulbat F50-N18L-A3 · Motorcycle battery 12V 21.1Ah 260A

![Fulbat F50-N18L-A3 · Motorcycle battery 12V 21.1Ah 260A](https://bateriasonline.es/502-home_default/fulbat-f50-n18l-a3.jpg)

> Fulbat F50-N18L-A3: 21.1 Ah motorcycle battery, 260 A (EN), 205×90×162 mm, positive terminal on the right. Equivalent to Exide E50-N18L-A and Exide E50-N18L-A3.

**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-a3
- **Language**: en
- **Brand**: Fulbat
- **Reference**: BOL-FULBAT-F50-N18L-A3
- **MPN**: F50-N18L-A3
- **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 | 6.61 kg |
| Polarity | Positive terminal on the right |

## Quick description

Fulbat F50-N18L-A3: 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-A3 at a glance

The Fulbat F50-N18L-A3 is a motorcycle starter battery: compact, vibration-resistant and with just the right power to turn the starter motor and feed the electronics. With 21.1 Ah, the F50-N18L-A3 suits motorcycles and scooters that had a battery of that capacity.
At 21.1 Ah it is a large battery for heavy motorcycles, jet skis and utility quads. The F50-N18L-A3 belongs to the Fulbat FULBAT Motorcycle DRY range. [The full range of Fulbat batteries](https://bateriasonline.es/en/fulbat-batteries)

## Equivalents and alternatives to the Fulbat F50-N18L-A3

Batteries that fit the F50-N18L-A3's tray with the same polarity; besides other conventional batteries, an EFB or AGM of this size is a valid upgrade for the F50-N18L-A3.

| 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-A / 12N18-3A | Lead-acid | 21.1 Ah | 260 A | 205 × 90 × 162 |

## Fulbat F50-N18L-A3 vs FTX24HL-BS and FB16AL-A2: differences

What sets the F50-N18L-A3 apart from its neighbours in the Fulbat range:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Fulbat F50-N18L-A3 (this one) | 21.1 Ah | 260 A | 205 × 90 × 162 | right | 6.61 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).

## Before ordering the F50-N18L-A3, check this

- Cold cranking: 260 A (EN), equal to or higher than the original.
- Capacity of the F50-N18L-A3: 21.1 Ah; the same as your current battery or slightly more is fine.
- The F50-N18L-A3 has the positive terminal on the right: compare it with your current battery.
- Length, width and height of the F50-N18L-A3: 205 × 90 × 162 mm.

## Frequently asked questions about the Fulbat F50-N18L-A3

### F50-N18L-A3 or FTX24HL-BS: which one suits me?

Compared with the F50-N18L-A3, 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-A3 is enough. Mind the space: the FTX24HL-BS measures 205 × 87 × 162 mm.

### How much does the Fulbat F50-N18L-A3 weigh?

6.61 kg, with 21.1 Ah of capacity. For reference, the Fulbat FTX24HL-BS (22.1 Ah) weighs 7.34 kg.

### Which battery is equivalent to the Fulbat F50-N18L-A3?

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-A3 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-A3?

On the F50-N18L-A3, 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.

### How do I stop the motorcycle battery going flat in winter?

Connect it to a maintenance charger or disconnect it if the bike will sit for more than a month. A flat motorcycle battery sulphates in a few weeks.

## What it means that the F50-N18L-A3 is lead-acid

The F50-N18L-A3 is a conventional lead-acid battery, with plates immersed in liquid electrolyte. In cars without energy management, the F50-N18L-A3 needs no special registration: just connect it.

## Other options if you are unsure about the F50-N18L-A3

- [All 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*