# Motorcycle battery Fulbat FTX20A-BS 12V 18.9Ah 270A AGM

![Motorcycle battery Fulbat FTX20A-BS 12V 18.9Ah 270A AGM](https://baterias.com/6139-home_default/battery-fulbat-ftx20a-bs-12v-18-9ah-270a.jpg)

> Fulbat FTX20A-BS motorcycle battery 12V 18.9Ah 270A AGM. Motorcycle MF range. Dimensions 150×87×161 mm, + terminal on the left. Verified OEM fitment.

**Category:** [Motorcycle Batteries](https://baterias.com/gb/motorcycle-batteries) → [FULBAT](https://baterias.com/gb/fulbat)

- **Canonical URL**: https://baterias.com/gb/battery-fulbat-ftx20a-bs-12v-18-9ah-270a
- **Language**: en-GB
- **Brand**: FULBAT
- **Reference**: BCOM-FULBAT-FTX20A-BS
- **MPN**: FTX20A-BS
- **Stock**: Out of stock

## Technical specifications

| Feature | Value |
|---|---|
| Brand | FULBAT |
| Model | FULBAT Motorcycle MF |
| Voltage (V) | 12 V |
| Largo | 150 mm |
| Ancho | 87 mm |
| Alto | 161 mm |
| Tecnología | AGM |
| Terminal layout | Positive left |
| Cold cranking amps (EN) | 270 A |
| Capacity (C20) | 18.9 Ah |
| Capacity (C10) | 18 Ah (c10) |

## Quick description

**Fulbat FTX20A-BS 12V 18,9Ah 270A** is a motorcycle starter battery with standard JIS code (the one on your bike's original label). Ready to use, sealed and vibration-resistant. Fits any model that takes the same JIS reference — the code your mechanic recognises at a glance.

## Why this motorcycle battery?

- **Same JIS reference** as your bike's original — fits first time
- **Sealed and ready to use** no acid handling, no refills
- **Survives winter storage** holds charge through long off-season

🔌 Voltage
12 V

⚡ Capacity
18,9 Ah C20

🔋 Cold cranking
270 A EN-1

📏 Dimensions
150×87×161 mm

⚙️ Technology
AGM

🧭 Polarity
Positive on the left

## Description

## Motorcycle battery Fulbat FTX20A-BS 18.9Ah 270A 12V

12*V* Voltage
18.9*Ah* Capacity
270*A* Cold cranking

The **Fulbat FTX20A-BS motorcycle battery** is rated at **12 V**, **18.9 Ah** and **270 A** of cold cranking current (EN), and is designed for motorcycles, scooters, quads and personal watercraft. Measuring 150 × 87 × 161 mm and the positive terminal on the left, it is the direct replacement for motorcycles fitted from the factory with a 18.9 Ah battery of this format.
- Holds its charge through winter storage.
- Compact and lightweight format.
- AGM: faster recharging and better cycle resistance than a conventional battery.
- Sealed and ready to fit, no acid handling.

### What the Fulbat FTX20A-BS is for

Designed for motorcycles, scooters, quads and personal watercraft, the Fulbat FTX20A-BS replaces the original battery of bikes that use this code or format. Check the position of the positive terminal before ordering.

### Size, terminals and hold-down of the Fulbat FTX20A-BS

The Fulbat FTX20A-BS is made in the 150 × 87 × 161 mm format. The positive terminal on the left decides which side the cables end up on: it is the detail that causes most buying mistakes, so check it before ordering. Checking the three dimensions and the terminal position before buying avoids the most common mistake when replacing a battery.

### Fulbat: the maker behind the FTX20A-BS

Fulbat has manufactured in France since 1978 and specialises in motorcycles and light vehicles. Its catalogue is short and clear, covers almost the whole fleet and works only with sealed, leak-free batteries. All the Fulbat batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty.

### Technology inside the Fulbat FTX20A-BS

The FTX20A-BS is one of the Fulbat references for this type of use; it shares the same manufacturing and quality-control criteria as the rest of the brand's catalogue.
AGM (Absorbent Glass Mat) technology seals the electrolyte in glass microfibre. The result is a maintenance-free battery that is highly vibration-resistant and able to withstand deep discharges that would ruin a classic lead-acid battery.

### Usage and maintenance tips

Check the resting voltage before the season (above 12.6 V on a charged battery) and make sure the terminals are clean and tight. If the bike spends the winter standing, connect a trickle charger: deep discharge through inactivity is the first cause of premature failure.

### Warranty and coverage

The Fulbat FTX20A-BS comes with the **manufacturer's official warranty**. The warranty does not cover discharge through prolonged inactivity: if the bike stands for months, use a trickle charger.

### When you get it and how to return it

Orders placed **before [[ks:cutoff]]** with the battery in stock ship the same day. Delivery in mainland Spain and Portugal takes 24-48 working hours; for the Balearic Islands and the rest of the European Union allow 3 to 5 working days. You have **[[ks:return_days]] days** to return an unused battery; in mainland Spain and Portugal collection is free. We email you the tracking number as soon as the parcel ships.

## Frequently asked questions

### How is the Fulbat FTX20A-BS battery installed in the vehicle?

In most motorcycles it fits in 15-30 minutes with a 10 mm wrench; if the battery is under the seat or in the boot the time can double. See the step-by-step guide on this page. Quick summary: 1) switch off the engine and remove the key; 2) locate the original battery (engine bay, boot or under seat); 3) disconnect the negative (−) terminal first, then the positive (+); 4) loosen the hold-down clamp and remove the old battery; 5) fit the new one in the same orientation — match the polarity shown on the product sheet; 6) connect the positive (+) first, then the negative (−). On motorcycles with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile.

### How long does the Fulbat FTX20A-BS battery last?

Expected lifespan of the Fulbat FTX20A-BS is 4 to 7 years in regular use (depends on technology and climate). In cold regions it drops slightly due to cold-start stress; in very hot regions it also drops because of electrolyte evaporation. To extend its life: avoid deep discharges (headlights on with engine off), have the alternator checked yearly, and keep the battery clean and properly secured.

### What are the dimensions of the Fulbat FTX20A-BS battery?

Dimensions (length × width × height) are 150×87×161 mm — also written as 150x87x161 mm — following the European DIN standard. Always measure the space in your motorcycle before buying: even one extra millimetre can prevent the hold-down clamp from closing. The height shown includes the terminals.

### Will the Fulbat FTX20A-BS battery fit my motorcycle?

Three options to confirm: 1) enter your number plate in the finder (DGT/DVLA/KBA auto-detect your model and engine); 2) check the "Compatible vehicles" tab on this page, where we list every vehicle verified by our technical team; 3) if you cannot find your model, message us on WhatsApp with brand, model, engine and year — we reply during business hours (Mon–Fri 10:00–13:30 and 16:40–18:00 (Spanish time, CET)). The FTX20A-BS typically fits a wide range of European vehicles thanks to its standard DIN case format.

### What are the equivalents of the FTX20A-BS model?

Directly interchangeable batteries (same dimensions, same polarity, same Ah and CCA) are the OEM equivalents from leading brands: Bosch, Tudor, Exide and, depending on the model, Banner or Yuasa. Exact equivalence depends on technology — an EFB cannot be replaced with a conventional battery in Start-Stop motorcycles. See the "Equivalents" section to view recommended options at the same performance level.


## Technical team (editorial authorship)

The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team — automotive battery specialists since 2015.

→ https://baterias.com/gb/technical-team

---
*baterias.com — Automotive batteries · 2026-10-09*