# Motorcycle battery Motobatt MB9U 12V 11Ah 140A AGM ![Motorcycle battery Motobatt MB9U 12V 11Ah 140A AGM](https://baterias.com/895-home_default/battery-motobatt-mb9u-11ah.jpg) > Motobatt MB9U motorcycle battery 12V 11Ah 140A AGM. Replaces YB7A, YB7LB, YB9LA2, YB9B, YB9LB2, 12N7-3B, 12N7-4A, 12N9-3B. QUADFLEX range. Verified OEM fitment. **Category:** [Motorcycle Batteries](https://baterias.com/gb/motorcycle-batteries) β†’ [MOTOBATT](https://baterias.com/gb/motobatt) - **Canonical URL**: https://baterias.com/gb/battery-motobatt-mb9u-11ah - **Language**: en-GB - **Brand**: MOTOBATT - **Reference**: BCOM-MOTOBATT-MB9U - **MPN**: MB9U - **Price**: 119,80 € - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | MOTOBATT | | Reference | MB9 U | | Model | MOTOBATT QUADFLEX | | Voltage (V) | 12 V | | Largo | 136 mm | | Ancho | 76 mm | | Alto | 133 mm | | Peso | 3.35 kg | | TecnologΓ­a | Quadflex | | JIS | 12N7-3 B 12N7-4 A YB7 A YB7 LB YB9LA2 YB9 B YB9LB2 12N9-3 B | | Cold cranking amps (EN) | 140 A | | Capacity (C20) | 11 Ah (c20) | | Capacity (C10) | 11 Ah (c10) | ## Quick description **Motobatt MB9U 12V 11Ah 140A** 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 β€” fits first time - **Sealed and ready to use** no acid handling, no refills - **Survives winter storage** holds charge through long off-season 🏍️ JIS code 12N7-3B, 12N7-4A, YB7A, YB7LB, YB9LA2, YB9B, YB9LB2, 12N9-3B πŸ”Œ Voltage 12 V ⚑ Capacity 11 Ah C20 πŸ”‹ Cold cranking 140 A EN-1 πŸ“ Dimensions 136Γ—76Γ—133 mm βš™οΈ Technology AGM Quadflex βš–οΈ Weight 3,35 kg 🏷️ Model MOTOBATT QUADFLEX #️⃣ Mfr. reference MB9U ## Description ## Motorcycle battery Motobatt 12N7-3B Quadflex 11Ah 140A 12V Equivalent JIS codes 12N7-3B 12N7-4A YB7A YB7LB YB9LA2 YB9B YB9LB2 12N9-3B 12*V* Voltage 11*Ah* Capacity 140*A* Cold cranking 3.35*kg* Weight The **Motobatt 12N7-3B** from the **Quadflex** range is a motorcycle battery with **11 Ah** and **140 A** of cold cranking current (EN), designed for motorcycles, scooters, quads and personal watercraft. It replaces the original battery without adaptation in motorcycles with a 136 Γ— 76 Γ— 133 mm format: same 11 Ah capacity. - 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 Motobatt 12N7-3B is for Designed for motorcycles, scooters, quads and personal watercraft, the Motobatt 12N7-3B 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 3.35 kg. ### Will it fit your current battery tray? The Motobatt 12N7-3B is made in the 136 Γ— 76 Γ— 133 mm format and weighs 3.35 kg. Checking the three dimensions and the terminal position before buying avoids the most common mistake when replacing a battery. ### The Motobatt 12N7-3B: Quadflex range and AGM technology The 12N7-3B is part of the Motobatt **Quadflex** range. Choosing the right reference within the series comes down to capacity, dimensions and terminals: technology and quality are common to the whole family. 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. ### Motobatt: the maker behind the 12N7-3B 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. ### Manufacturer's warranty The Motobatt 12N7-3B 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. ### Care and maintenance 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. ### Delivery times and returns Same-day dispatch from our warehouse for in-stock orders placed **before [[ks:cutoff]]**: 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 **[[ks:return_days]] days** if the battery has not been used (free collection on the Iberian mainland). You will receive tracking by email. ## Frequently asked questions ### How is the Motobatt 12N9-3B 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 our blog. 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 (βˆ’) 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 β€” match the polarity shown on the product sheet; 6) connect the positive (+) first, then the negative (βˆ’). On motorcycles with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile. ### What is the service life of the 12N9-3B model? Expected lifespan of the Motobatt 12N9-3B 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 12N9-3B model? Dimensions (length Γ— width Γ— height) are 136Γ—76Γ—133 mm β€” also written as 136x76x133 mm β€” 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. ### Is the 12N9-3B 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 β€” we reply during business hours (Mon–Fri 10:00–13:30 and 16:40–18:00 (Spanish time, CET)). The 12N9-3B typically fits a wide range of European vehicles thanks to its standard DIN case format. ### Which batteries are equivalent to the Motobatt 12N9-3B? 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 β€” 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 β€” automotive battery specialists since 2012. β†’ https://baterias.com/gb/technical-team --- *baterias.com β€” Automotive batteries Β· 2026-10-22*