# Fulbat 51814 · Motorcycle battery 12V 18Ah 210A

![Fulbat 51814 · Motorcycle battery 12V 18Ah 210A](https://bateriasonline.es/394-home_default/fulbat-51814.jpg)

> Fulbat 51814: 18 Ah motorcycle battery, 210 A (EN), 186×82×171 mm, positive terminal on the right. Equivalent to Exide 12Y16A-3A and Varta 518014024.

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

- **Canonical URL**: https://bateriasonline.es/en/fulbat-51814
- **Language**: en
- **Brand**: Fulbat
- **Reference**: BOL-FULBAT-51814
- **MPN**: 51814
- **Last updated**: 2026-11-06

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Fulbat |
| Range | FULBAT Motorcycle DRY |
| Application | Motorcycles |
| Technology | Lead-acid |
| Voltage | 12 V |
| Capacity | 18 Ah |
| Cold cranking amps (EN) | 210 A |
| Length | 186 mm |
| Width | 82 mm |
| Height | 171 mm |
| Weight | 6.08 kg |
| Polarity | Positive terminal on the right |

## Quick description

Fulbat 51814: motorcycle battery with 12 V, 18 Ah and 210 A cold cranking current, measuring 186 × 82 × 171 mm, with the positive terminal on the right.

## Description

## Where the Fulbat 51814 fits

The Fulbat 51814 is made for motorcycles, scooters and quads. With 18 Ah, the 51814 suits motorcycles and scooters that had a battery of that capacity.
At 18 Ah it goes into large-capacity motorcycles, adventure bikes, customs and quads. The 51814 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 51814

Batteries that fit the 51814's tray with the same polarity; besides other conventional batteries, an EFB or AGM of this size is a valid upgrade for the 51814.

| Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Varta 518014024 | Lead-acid | 18 Ah | 240 A | 186 × 82 × 171 |
| Varta 519013024 | Lead-acid | 19 Ah | 240 A | 186 × 82 × 171 |
| Exide 12Y16A-3A | Lead-acid | 20 Ah | 210 A | 185 × 80 × 170 |
| Varta T19BL (FA) | AGM | 18 Ah | 220 A | 186 × 82 × 171 |
| Fulbat 51913 | Lead-acid | 19 Ah | 210 A | 186 × 82 × 171 |

## Fulbat 51814 vs 51913 and FB16CL-B: differences

What sets the 51814 apart from its neighbours in the Fulbat range:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Fulbat 51814 (this one) | 18 Ah | 210 A | 186 × 82 × 171 | right | 6.08 kg |
| Fulbat 51913 | 19 Ah | 210 A | 186 × 82 × 171 | right | 6.08 kg |
| Fulbat FB16CL-B | 20 Ah | 240 A | 175 × 100 × 175 | right | 6.04 kg |

- Fulbat 51913: 1 Ah more, the same cranking power, the same dimensions.
- Fulbat FB16CL-B: 2 Ah more, 30 A more cranking power, a different case (175 × 100 × 175 mm).

## Check this before ordering the Fulbat 51814

- Check the EN amps on your battery: if it says 210 A or less, the 51814 covers your engine.
- Capacity of the 51814: 18 Ah; the same as your current battery or slightly more is fine.
- Polarity of the 51814: positive terminal on the right (if yours has it on the other side, the cables will not reach).
- The 51814 needs 186 × 82 × 171 mm of space: measure it with the hold-down clamp in place.

## Frequently asked questions about the Fulbat 51814

### 51814 or 51913: which one suits me?

Compared with the 51814, the Fulbat 51913 has 1 Ah more. With the same cranking power (210 A), the 51814 and the 51913 differ in capacity: the one with more Ah supports more load with the engine off. Both measure 186 × 82 × 171 mm, so they fit the same tray.

### How much does the Fulbat 51814 weigh?

6.08 kg, with 18 Ah of capacity. For reference, the Fulbat 51913 (19 Ah) weighs 6.08 kg.

### Which battery is equivalent to the Fulbat 51814?

With the same dimensions, polarity and similar capacity you have the Varta 518014024, Varta 519013024 and Exide 12Y16A-3A. As the 51814 is a conventional battery, an EFB or AGM of the same size also works.

### Which side is the positive terminal on the Fulbat 51814?

On the 51814, 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 Fulbat 51814 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.

## What it means that the 51814 is lead-acid

Inside, the 51814 is classic lead-acid: liquid electrolyte and lead plates. If the 51814 is left discharged for weeks it sulphates: a maintenance charger prevents this.

## Keep comparing: alternatives to the 51814

- [More motorcycle batteries](https://bateriasonline.es/en/motorcycle-batteries)
- [More Fulbat models](https://bateriasonline.es/en/fulbat-batteries)
- [Varta 518014024](https://bateriasonline.es/en/varta-518014024) · 18 Ah, 240 A, 186×82×171 mm
- [Varta 519013024](https://bateriasonline.es/en/varta-519013024) · 19 Ah, 240 A, 186×82×171 mm

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