# Motorcycle battery Fulbat FTX9-BS 12V 8.4Ah 135A AGM ![Motorcycle battery Fulbat FTX9-BS 12V 8.4Ah 135A AGM](https://baterias.com/6058-home_default/battery-fulbat-ftx9-bs-12v-8-4ah-135a.jpg) > Fulbat FTX9-BS motorcycle battery 12V 8.4Ah 135A AGM. Motorcycle MF range. Dimensions 150×87×105 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-ftx9-bs-12v-8-4ah-135a - **Language**: en-GB - **Brand**: FULBAT - **Reference**: BCOM-FULBAT-FTX9-BS - **MPN**: FTX9-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 | 105 mm | | Tecnología | AGM | | Terminal layout | Positive left | | Cold cranking amps (EN) | 135 A | | Capacity (C20) | 8.4 Ah | | Capacity (C10) | 8 Ah (c10) | ## Quick description **Fulbat FTX9-BS 12V 8,4Ah 135A** 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 8,4 Ah C20 🔋 Cold cranking 135 A EN-1 📏 Dimensions 150×87×105 mm ⚙️ Technology AGM 🧭 Polarity Positive on the left ## Description ## Motorcycle battery Fulbat FTX9-BS 8.4Ah 135A 12V 12*V* Voltage 8.4*Ah* Capacity 135*A* Cold cranking The **Fulbat FTX9-BS motorcycle battery** is rated at **12 V**, **8.4 Ah** and **135 A** of cold cranking current (EN), and is designed for motorcycles, scooters, quads and personal watercraft. It replaces the original battery without adaptation in motorcycles with a 150 × 87 × 105 mm format: same 8.4 Ah capacity and the positive terminal on the left. - Resistant to the vibration typical of two wheels. - Energetic cranking for high-compression engines. - AGM technology: absorbed electrolyte, no spills, can be mounted at an angle. - Same JIS code as the original battery: fits first time. ### What the Fulbat FTX9-BS is for Designed for motorcycles, scooters, quads and personal watercraft, the Fulbat FTX9-BS replaces the original battery of bikes that use this code or format. Check the position of the positive terminal before ordering. ### Technology inside the Fulbat FTX9-BS The FTX9-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. In an AGM battery the electrolyte is absorbed in glass-fibre separators: there is no free liquid, it cannot spill and it can be mounted at an angle. That construction lowers internal resistance, speeds up recharging and multiplies cycle life compared with a conventional battery. ### Will it fit your current battery tray? In terms of format, the Fulbat FTX9-BS measures 150 × 87 × 105 mm (length × width × height). 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 FTX9-BS French brand Fulbat is a European reference in motorcycle, garden and leisure batteries: compact ranges, clear JIS codes and a consistent quality that workshops know well. We guarantee that every Fulbat arrives new, charged and with the manufacturer's full warranty. ### How to make it last longer If the bike spends the winter standing, connect a trickle charger: deep discharge through inactivity is the first cause of premature failure. Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators. ### Warranty and coverage The Fulbat FTX9-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. ### Shipping, delivery and returns 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 and Canary 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 do I fit the FTX9-BS model in my motorcycle? 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 FTX9-BS battery last? Expected lifespan of the Fulbat FTX9-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 measurements of the FTX9-BS model? Dimensions (length × width × height) are 150×87×105 mm — also written as 150x87x105 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 FTX9-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 FTX9-BS typically fits a wide range of European vehicles thanks to its standard DIN case format. ### What are the equivalents of the FTX9-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 — over 25 years of experience validating automotive batteries. → https://baterias.com/gb/technical-team --- *baterias.com — Automotive batteries · 2026-10-03*