# Motorcycle battery Fulbat FB4L-B GEL 12V 5.3Ah 50A GEL ![Motorcycle battery Fulbat FB4L-B GEL 12V 5.3Ah 50A GEL](https://baterias.com/6180-home_default/battery-fulbat-fb4l-b-gel-12v-5-3ah-50a.jpg) > Fulbat FB4L-B GEL motorcycle battery 12V 5.3Ah 50A GEL. Motorcycle GEL range. Dimensions 120×70×92 mm, + terminal on the right. 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-fb4l-b-gel-12v-5-3ah-50a - **Language**: en-GB - **Brand**: FULBAT - **Reference**: BCOM-FULBAT-FB4L-B GEL - **MPN**: FB4L-B GEL - **Price**: 31,36 € (VAT incl., Spain) - **Last updated**: 2026-10-02 - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | FULBAT | | Model | FULBAT Motorcycle GEL | | Voltage (V) | 12 V | | Largo | 120 mm | | Ancho | 70 mm | | Alto | 92 mm | | Tecnología | GEL | | Terminal layout | Positive right | | Cold cranking amps (EN) | 50 A | | Capacity (C20) | 5.3 Ah | | Capacity (C10) | 5 Ah (c10) | ## Quick description **Fulbat FB4L-B GEL 12V 5,3Ah 50A** 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 5,3 Ah C20 🔋 Cold cranking 50 A EN-1 📏 Dimensions 120×70×92 mm ⚙️ Technology GEL 🧭 Polarity Positive on the right ## Description ## Motorcycle battery Fulbat FB4L-B 5.3Ah 50A 12V 12*V* Voltage 5.3*Ah* Capacity 50*A* Cold cranking With **5.3 Ah** at **12 V** and **50 A** of cold cranking current (EN), the **Fulbat FB4L-B** with GEL technology replaces the original battery of motorcycles, scooters, quads and personal watercraft. Measuring 120 × 70 × 92 mm and the positive terminal on the right, it is the direct replacement for motorcycles fitted from the factory with a 5.3 Ah battery of this format. - GEL: excellent resistance to deep discharge and long cycle life. - Sealed and ready to fit, no acid handling. - Holds its charge through winter storage. - Compact and lightweight format. ### What the Fulbat FB4L-B is for With 5.3 Ah, the Fulbat FB4L-B covers the starting of motorcycles, scooters, quads and personal watercraft. The JIS code on your current battery label is the safest way to confirm equivalence. ### Will it fit your current battery tray? In terms of format, the Fulbat FB4L-B measures 120 × 70 × 92 mm (length × width × height). The positive terminal on the right 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. ### Why choose Fulbat batteries 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. We guarantee that every Fulbat arrives new, charged and with the manufacturer's full warranty. ### Technology inside the Fulbat FB4L-B Fulbat builds the FB4L-B to the same standards as the rest of its catalogue; what changes between references is capacity, format and terminal position. GEL technology fixes the acid in a solid gel. That removes maintenance and leaks and gives very long cycle life, in exchange for slightly slower recharging and lower peak current than an AGM. ### Care and maintenance GEL batteries need lower charging voltages: always use a charger with a GEL mode so as not to damage the electrolyte. If the bike spends the winter standing, connect a trickle charger: deep discharge through inactivity is the first cause of premature failure. ### Manufacturer's warranty The Fulbat FB4L-B 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. ### Delivery times and returns Order **before 6:00 pm** with stock available and it leaves today: mainland Spain and Portugal receive it in 24-48 working hours, the islands and the rest of the EU in 3 to 5 days. You have **14 days** to return it if it has not been installed, with free collection on the mainland, and shipment tracking by email. ## Frequently asked questions ### Is the FB4L-B GEL model a gel battery? Where is it used? Yes, this model is a GEL battery: sealed lead-acid where the electrolyte is in gel form. It tolerates deep discharges very well and is ideal for cyclic use (solar, motorhomes, electric wheelchairs, motorcycles). Requires a GEL-specific smart charger — max charge voltage ~14.1 V (vs 14.4-14.7 V for AGM). Lifespan 6-10 years. ### How should this motorcycle battery be charged? With a 12 V motorcycle charger delivering at most 10 % of its capacity: 0.5 A for its 5.3 Ah. High-current car chargers can damage it. If the bike is laid up for the winter, keep it on a maintenance charger. ### Does it need maintenance? No: being GEL, it is sealed and nothing needs topping up. Just keep it charged if the bike stands for a long time. ### How long does the Fulbat FB4L-B GEL battery last? Expected lifespan of the Fulbat FB4L-B GEL is 4 to 6 years, keeping it charged when the bike is not in use. 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 FB4L-B GEL model? Dimensions (length × width × height) are 120×70×92 mm — also written as 120x70x92 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. ### What polarity does the Fulbat FB4L-B GEL battery have? Polarity: positive on the right. To identify it, place the battery in front of you with the terminals facing you and check which side the positive (+, marked with a red ring) is on. Before buying, verify the polarity matches your current battery: switching polarity forces longer cables or system reconfiguration, with short-circuit risk. ### Is the FB4L-B GEL valid for my vehicle? 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 FB4L-B GEL typically fits a wide range of European vehicles thanks to its standard DIN case format. ### What are the equivalents of the FB4L-B GEL 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 2012. → https://baterias.com/gb/technical-team --- *baterias.com — Automotive batteries · 2026-10-31*