# Motorcycle battery Motobatt MBT9B4 Quadflex 12V 9Ah 115A AGM ![Motorcycle battery Motobatt MBT9B4 Quadflex 12V 9Ah 115A AGM](https://baterias.com/886-home_default/battery-motobatt-mbt9b4-9ah.jpg) > Motobatt MBT9B4 motorcycle battery 12V 9Ah 115A AGM. Replaces YT9B4, YT9BBS. QUADFLEX range. Dimensions 150×70×104 mm. Verified OEM fitment. **Category:** [Motorcycle Batteries](https://baterias.com/gb/motorcycle-batteries) → [MOTOBATT](https://baterias.com/gb/motobatt) - **Canonical URL**: https://baterias.com/gb/battery-motobatt-mbt9b4-9ah - **Language**: en-GB - **Brand**: MOTOBATT - **Reference**: BCOM-MOTOBATT-MBT9B4 - **MPN**: MBT9B4 - **Price**: 113,10 € (VAT incl., Spain) - **Last updated**: 2026-10-28 - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | MOTOBATT | | Reference | MBT9B4 | | Model | MOTOBATT QUADFLEX | | Voltage (V) | 12 V | | Largo | 150 mm | | Ancho | 70 mm | | Alto | 104 mm | | Peso | 2.82 kg | | Tecnología | Quadflex | | JIS | YT9B4-YT9 BBS | | Cold cranking amps (EN) | 115 A | | Capacity (C20) | 9 Ah (c20) | | Capacity (C10) | 9 Ah (c10) | ## Quick description **Motobatt MBT9B4 12V 9Ah 115A** is a sealed motorcycle battery ready to fit, with the JIS reference your mechanic recognises at a glance. Vibration-resistant, keeps voltage during the winter off-season and cranks first time when you take it out for a ride. ## 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 🏍️ JIS code YT9B4, YT9BBS 🔌 Voltage 12 V ⚡ Capacity 9 Ah C20 🔋 Cold cranking 115 A EN-1 📏 Dimensions 150×70×104 mm ⚙️ Technology AGM Quadflex ⚖️ Weight 2,82 kg 🏷️ Model MOTOBATT QUADFLEX #️⃣ Mfr. reference MBT9B4 ## Description ## Motorcycle battery Motobatt YT9B4-YT9BBS Quadflex 9Ah 115A 12V JIS code YT9B4-YT9BBS 12*V* Voltage 9*Ah* Capacity 115*A* Cold cranking 2.82*kg* Weight With **9 Ah** at **12 V** and **115 A** of cold cranking current (EN), the **Motobatt YT9B4-YT9BBS** with AGM technology replaces the original battery of motorcycles, scooters, quads and personal watercraft. It measures 150 × 70 × 104 mm, the format sought by anyone replacing a 9 Ah battery in motorcycles. - Energetic cranking for high-compression engines. - Resistant to the vibration typical of two wheels. - Same JIS code as the original battery: fits first time. - AGM technology: absorbed electrolyte, no spills, can be mounted at an angle. ### What the Motobatt YT9B4-YT9BBS is for Designed for motorcycles, scooters, quads and personal watercraft, the Motobatt YT9B4-YT9BBS replaces the original battery of bikes that use this code or format. Check the position of the positive terminal before ordering. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 2.82 kg. ### Dimensions, polarity and mounting It has external dimensions of 150 × 70 × 104 mm and weighs 2.82 kg. For a direct replacement, the current battery tray must accept these dimensions and the same terminal layout; otherwise adapters will be needed or the hold-down will change. ### The Motobatt YT9B4-YT9BBS: Quadflex range and AGM technology Within the Motobatt catalogue, the **Quadflex** series groups the references designed for this use. The YT9B4-YT9BBS is the 9 Ah model of that family, with the same performance as its siblings in other sizes. AGM means the acid is held in a glass mat instead of floating free. That is why the battery can be installed in the cabin without gases, survives more cycles and recovers its charge quickly. ### What Motobatt does differently Motobatt batteries stand out for capacity and cranking current above the original battery in the same tray, thanks to a compact AGM design and the four-terminal Quadflex system. At baterias.com we work directly with the manufacturer or its official distributor: real stock, brand-new product and official warranty. ### Official warranty The Motobatt YT9B4-YT9BBS 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. ### 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. Avoid repeated cranking attempts on a cold bike for long: if it does not start on the third try, let the battery rest for a minute. ### When you get it and how to return it Same-day dispatch from our warehouse for in-stock orders placed **before 6:00 pm**: 24-48 working hours in mainland Spain and Portugal, 3 to 5 days in the islands and the rest of Europe. Returns are accepted for **14 days** if the battery has not been used (free collection on the Iberian mainland). You will receive tracking by email. ## Frequently asked questions ### How should this motorcycle battery be charged? With a 12 V motorcycle charger delivering at most 10 % of its capacity: 0.9 A for its 9 Ah. High-current car chargers can damage it. If the bike is laid up for the winter, keep it on a maintenance charger. ### How long does the Motobatt YT9B4-YT9BBS battery last? Estimated lifespan of the Motobatt YT9B4-YT9BBS: 3 to 5 years, keeping it charged when the bike is not in use. Treat it as an approximate guide, as every case is different. It can vary considerably with usage (short or long journeys), temperature, the condition of the alternator and charging system, power drawn with the engine off and maintenance. Cold demands more at every start and intense heat evaporates the electrolyte. ### What size is this battery? Length × width × height: 150x70x104 mm. Height is measured to the top of the terminals. Measure your motorcycle's battery tray first; if the battery exceeds it by even a millimetre, the hold-down clamp may not close. ### Does this battery fit my motorcycle? Not sure? Try your number plate in the finder (DGT/DVLA/KBA detect model and engine) or the "Compatible vehicles" tab, checked by our technical team; if your motorcycle is not there, send us make, model, engine and year on WhatsApp and we will reply during business hours (Mon–Fri 10:00–13:30 and 16:30–18:00 (Spanish time, CET)). If our table and the motorcycle handbook disagree, go with what the manufacturer says. ### Which batteries are equivalent to the Motobatt YT9B4-YT9BBS? A battery interchangeable with the Motobatt YT9B4-YT9BBS must match it on dimensions (150×70×104 mm), polarity, capacity (9 Ah) and cranking current (115 A). The "Equivalents" section further down lists the recommended alternatives. ## 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 · 2026-11-13*