# Motorcycle battery Motobatt MBT12B4 Quadflex 12V 11Ah 150A AGM ![Motorcycle battery Motobatt MBT12B4 Quadflex 12V 11Ah 150A AGM](https://baterias.com/891-home_default/battery-motobatt-mbt12b4-11ah.jpg) > Motobatt MBT12B4 motorcycle battery 12V 11Ah 150A AGM. Replaces YT12BBS, YT12B4. QUADFLEX range. Dimensions 150×70×130 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-mbt12b4-11ah - **Language**: en-GB - **Brand**: MOTOBATT - **Reference**: BCOM-MOTOBATT-MBT12B4 - **MPN**: MBT12B4 - **Price**: 145,30 € (VAT incl., Spain) - **Last updated**: 2026-10-28 - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | MOTOBATT | | Reference | MBT12B4 | | Model | MOTOBATT QUADFLEX | | Voltage (V) | 12 V | | Largo | 150 mm | | Ancho | 70 mm | | Alto | 130 mm | | Peso | 3.52 kg | | Tecnología | Quadflex | | JIS | YT12 BBS-YT12B4 | | Cold cranking amps (EN) | 150 A | | Capacity (C20) | 11 Ah (c20) | | Capacity (C10) | 11 Ah (c10) | ## Quick description **Motobatt MBT12B4 12V 11Ah 150A** 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 🏍️ JIS code YT12BBS, YT12B4 🔌 Voltage 12 V ⚡ Capacity 11 Ah C20 🔋 Cold cranking 150 A EN-1 📏 Dimensions 150×70×130 mm ⚙️ Technology AGM Quadflex ⚖️ Weight 3,52 kg 🏷️ Model MOTOBATT QUADFLEX #️⃣ Mfr. reference MBT12B4 ## Description ## Motorcycle battery Motobatt YT12BBS-YT12B4 Quadflex 11Ah 150A 12V JIS code YT12BBS-YT12B4 12*V* Voltage 11*Ah* Capacity 150*A* Cold cranking 3.52*kg* Weight The **Motobatt YT12BBS-YT12B4 motorcycle battery** is rated at **12 V**, **11 Ah** and **150 A** of cold cranking current (EN) from the **Quadflex** range, and is designed for motorcycles, scooters, quads and personal watercraft. Its 150 × 70 × 130 mm make it the exact replacement for the 11 Ah battery fitted as standard to many motorcycles. - Compact and lightweight format. - Holds its charge through winter storage. - Sealed and ready to fit, no acid handling. - AGM: faster recharging and better cycle resistance than a conventional battery. ### What the Motobatt YT12BBS-YT12B4 is for Designed for motorcycles, scooters, quads and personal watercraft, the Motobatt YT12BBS-YT12B4 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 3.52 kg. ### Dimensions, polarity and mounting The Motobatt YT12BBS-YT12B4 is made in the 150 × 70 × 130 mm format and weighs 3.52 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. ### Motobatt: the maker behind the YT12BBS-YT12B4 Motobatt is the motorcycle battery specialist with Quadflex technology: four terminals that let you connect the battery in any position and a sealed AGM construction ready to fit. All the Motobatt batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty. ### The Motobatt YT12BBS-YT12B4: Quadflex range and AGM technology Within the Motobatt catalogue, the **Quadflex** series groups the references designed for this use. The YT12BBS-YT12B4 is the 11 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. ### 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. 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. ### Warranty and coverage The Motobatt YT12BBS-YT12B4 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 Orders placed **before 6:00 pm** 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 **14 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 should this motorcycle battery be charged? With a 12 V motorcycle charger delivering at most 10 % of its capacity: 1.1 A for its 11 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 YT12BBS-YT12B4 battery last? As a rough estimate, the Motobatt YT12BBS-YT12B4 typically lasts 3 to 5 years, keeping it charged when the bike is not in use; it is a guide figure, not a guaranteed period. 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 are the dimensions of the Motobatt YT12BBS-YT12B4 battery? The Motobatt YT12BBS-YT12B4 takes up 150×70×130 mm (length, width and height, terminals included). Before buying, measure the space in your motorcycle: one extra millimetre can stop the hold-down clamp from closing. ### Will the Motobatt YT12BBS-YT12B4 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)). The motorcycle manufacturer's specifications always take priority over our tables. ### What are the equivalents of the YT12BBS-YT12B4 model? A direct equivalent needs what this YT12BBS-YT12B4 offers: 150×70×130 mm, the same Ah and CCA. The "Equivalents" section of this page gathers the recommended options with equivalent performance. ## 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 · 2026-11-07*