# Fulbat 12N5.5-4A · Motorcycle battery 12V 5.8Ah 55A

![Fulbat 12N5.5-4A · Motorcycle battery 12V 5.8Ah 55A](https://bateriasonline.es/384-home_default/fulbat-12n5-5-4a.jpg)

> Fulbat 12N5.5-4A: 5.8 Ah motorcycle battery, 55 A (EN), 135×60×130 mm, positive terminal on the left. Price on request: ask for a free quote.

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

- **Canonical URL**: https://bateriasonline.es/en/fulbat-12n5-5-4a
- **Language**: en
- **Brand**: Fulbat
- **Reference**: BOL-FULBAT-12N5.5-4A
- **MPN**: 12N5.5-4A
- **Last updated**: 2026-10-27

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Fulbat |
| Range | FULBAT Motorcycle DRY |
| Application | Motorcycles |
| Technology | Lead-acid |
| Voltage | 12 V |
| Capacity | 5.8 Ah |
| Cold cranking amps (EN) | 55 A |
| Length | 135 mm |
| Width | 60 mm |
| Height | 130 mm |
| Weight | 2.27 kg |
| Polarity | Positive terminal on the left |

## Quick description

The Fulbat 12N5.5-4A is a motorcycle battery with 12 V, 5.8 Ah and 55 A cold cranking current, measuring 135 × 60 × 130 mm, with the positive terminal on the left. Need the positive terminal on the right? The same battery is the Fulbat 12N5.5-3B.

## Description

## Where the Fulbat 12N5.5-4A fits

The Fulbat 12N5.5-4A 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 12N5.5-4A on a maintenance charger if the bike is laid up over winter.
At 5.8 Ah it is a small battery, typical of 50 to 125 cc scooters and light motorcycles. The 12N5.5-4A belongs to the Fulbat FULBAT Motorcycle DRY range. [See all Fulbat batteries](https://bateriasonline.es/en/fulbat-batteries)

## Equivalents and alternatives to the Fulbat 12N5.5-4A

No other reference in the catalogue fully matches the dimensions and polarity of the 12N5.5-4A; you will find the closest ones among our [motorcycle batteries](https://bateriasonline.es/en/motorcycle-batteries).

## Fulbat 12N5.5-4A vs FTX7A-BS and 12N5.5-3B: differences

How the 12N5.5-4A compares with Fulbat batteries of similar size and capacity:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Fulbat 12N5.5-4A (this one) | 5.8 Ah | 55 A | 135 × 60 × 130 | left | 2.27 kg |
| Fulbat FTX7A-BS | 6.3 Ah | 105 A | 150 × 87 × 93 | left | 2.51 kg |
| Fulbat 12N5.5-3B | 5.8 Ah | 55 A | 135 × 60 × 130 | right | 2.27 kg |

- Fulbat FTX7A-BS: 0.5 Ah more, 50 A more cranking power, a different case (150 × 87 × 93 mm), AGM technology.
- If the positive terminal of your battery is on the other side, the one you need is the Fulbat 12N5.5-3B (positive terminal on the right).

## Check this before ordering the Fulbat 12N5.5-4A

- Check the EN amps on your battery: if it says 55 A or less, the 12N5.5-4A covers your engine.
- Your current battery should say about 5.8 Ah; a little more is also fine.
- The 12N5.5-4A has the positive terminal on the left: compare it with your current battery.
- The 12N5.5-4A needs 135 × 60 × 130 mm of space: measure it with the hold-down clamp in place.

## Frequently asked questions about the Fulbat 12N5.5-4A

### Fulbat 12N5.5-4A or FTX7A-BS?

Compared with the 12N5.5-4A, the Fulbat FTX7A-BS has 0.5 Ah more, 50 A more cranking power and AGM technology. If your current battery says 105 A or more, choose the FTX7A-BS; if it says 55 A or less, the 12N5.5-4A is enough. Mind the space: the FTX7A-BS measures 150 × 87 × 93 mm.

### What is the difference between the Fulbat 12N5.5-4A and the 12N5.5-3B?

They are the same battery with the terminals swapped: positive terminal on the left on the 12N5.5-4A, positive terminal on the right on the 12N5.5-3B. Look at your current battery with the terminals facing you and pick the one that matches.

### How much does the Fulbat 12N5.5-4A weigh?

The 12N5.5-4A weighs 2.27 kg. For reference, the Fulbat FTX7A-BS (6.3 Ah) weighs 2.51 kg.

### 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.

## Inside the 12N5.5-4A: lead-acid technology

The 12N5.5-4A is a conventional lead-acid battery, with plates immersed in liquid electrolyte. In cars without energy management, the 12N5.5-4A needs no special registration: just connect it.

## Other options if you are unsure about the 12N5.5-4A

- [All motorcycle batteries](https://bateriasonline.es/en/motorcycle-batteries)
- [Full Fulbat catalogue](https://bateriasonline.es/en/fulbat-batteries)

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