# Fulbat 6N6-3B · Motorcycle battery 6V 6.3Ah 50A

![Fulbat 6N6-3B · Motorcycle battery 6V 6.3Ah 50A](https://bateriasonline.es/376-home_default/fulbat-6n6-3b.jpg)

> Fulbat 6N6-3B: 6.3 Ah motorcycle battery, 50 A (EN), 99×57×111 mm, positive terminal on the right. Equivalent to Fulbat 6N6-3B-1 and Motobatt MBT6N6.

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

- **Canonical URL**: https://bateriasonline.es/en/fulbat-6n6-3b
- **Language**: en
- **Brand**: Fulbat
- **Reference**: BOL-FULBAT-6N6-3B
- **MPN**: 6N6-3B
- **Last updated**: 2026-10-27

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Fulbat |
| Range | FULBAT Motorcycle DRY |
| Application | Motorcycles |
| Technology | Lead-acid |
| Voltage | 6 V |
| Capacity | 6.3 Ah |
| Cold cranking amps (EN) | 50 A |
| Length | 99 mm |
| Width | 57 mm |
| Height | 111 mm |
| Weight | 1.26 kg |
| Polarity | Positive terminal on the right |

## Quick description

Fulbat 6N6-3B: motorcycle battery with 6 V, 6.3 Ah and 50 A cold cranking current, measuring 99 × 57 × 111 mm, with the positive terminal on the right.

## Description

## Where the Fulbat 6N6-3B fits

The Fulbat 6N6-3B is a motorcycle starter battery: compact, vibration-resistant and with just the right power to turn the starter motor and feed the electronics. It is worth keeping the 6N6-3B on a maintenance charger if the bike is laid up over winter.
At 6.3 Ah it covers mid-capacity motorcycles, large scooters and light quads. The 6N6-3B 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 6N6-3B

Same dimensions and polarity as the 6N6-3B, with similar capacity and cranking power; as a conventional battery, the 6N6-3B 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) |
|---|---|---|---|---|
| Fulbat 6N6-3B-1 | Lead-acid | 6.3 Ah | 50 A | 99 × 57 × 111 |
| Motobatt MBT6N6 | AGM | 6 Ah | – | 97 × 56 × 111 |

## Fulbat 6N6-3B vs 6N4-2A-4 and 6N4-2A

The real differences between the 6N6-3B and the closest Fulbat models:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Fulbat 6N6-3B (this one) | 6.3 Ah | 50 A | 99 × 57 × 111 | right | 1.26 kg |
| Fulbat 6N4-2A-4 | 4.2 Ah | 25 A | 71 × 71 × 96 | right | 0.92 kg |
| Fulbat 6N4-2A | 4.2 Ah | 25 A | 71 × 71 × 96 | right | 0.92 kg |

- Fulbat 6N4-2A-4: 2.10 Ah less, 25 A less cranking power, a different case (71 × 71 × 96 mm).
- Fulbat 6N4-2A: 2.10 Ah less, 25 A less cranking power, a different case (71 × 71 × 96 mm).

## What to look at before buying the 6N6-3B

- Check the EN amps on your battery: if it says 50 A or less, the 6N6-3B covers your engine.
- With 6.3 Ah, the 6N6-3B replaces an original battery of that capacity or slightly less.
- The 6N6-3B has the positive terminal on the right: compare it with your current battery.
- Measure the space: the 6N6-3B takes up 99 × 57 × 111 mm.

## Frequently asked questions about the Fulbat 6N6-3B

### Fulbat 6N6-3B or 6N4-2A-4?

Compared with the 6N6-3B, the Fulbat 6N4-2A-4 has 2.10 Ah less and 25 A less cranking power. The 6N6-3B cranks harder; the 6N4-2A-4 is only a good option if your original battery says 25 A or less. Mind the space: the 6N4-2A-4 measures 71 × 71 × 96 mm.

### How much does the Fulbat 6N6-3B weigh?

The 6N6-3B weighs 1.26 kg. For reference, the Fulbat 6N4-2A-4 (4.2 Ah) weighs 0.92 kg.

### Which battery is equivalent to the Fulbat 6N6-3B?

With the same dimensions, polarity and similar capacity you have the Fulbat 6N6-3B-1 and Motobatt MBT6N6. As the 6N6-3B is a conventional battery, an EFB or AGM of the same size also works.

### Which side is the positive terminal on the Fulbat 6N6-3B?

The 6N6-3B has the positive terminal on the right, looking at the battery from its long side with the terminals closest to you.

### 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.

## Lead-acid technology in the 6N6-3B

The 6N6-3B is a conventional lead-acid battery, with plates immersed in liquid electrolyte. In cars without energy management, the 6N6-3B needs no special registration: just connect it.

## Keep comparing: alternatives to the 6N6-3B

- [More motorcycle batteries](https://bateriasonline.es/en/motorcycle-batteries)
- [More Fulbat models](https://bateriasonline.es/en/fulbat-batteries)
- [Exide 6N6-3B-1](https://bateriasonline.es/en/exide-6n6-3b-1) · 6 Ah, 40 A, 100×55×110 mm
- [Fulbat B49-6](https://bateriasonline.es/en/fulbat-b49-6) · 8.4 Ah, 80 A, 91×83×160 mm
- [Varta 6N6-3B-1](https://bateriasonline.es/en/varta-6n6-3b-1-006012003) · 6 Ah, 30 A, 100×57×110 mm

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