Motobatt MB9U · Motorcycle battery 12V 11Ah 140A AGM
Specifications
| Brand | MOTOBATT |
|---|---|
| Part number | MB9U |
| Voltage (V) | 12 |
| Capacity (C20) | 11Ah (c20) |
| Capacity (C10) | 11Ah (c10) |
| Technology | Quadflex |
| Length | 136.00 mm |
| Width | 76.00 mm |
| Height | 133.00 mm |
€119.80
VAT included
4,79/5★★★★★28 reviewsVerified purchases
- ★★★★★Tomas Suarez:
Gracias a vuestra ayuda pude instalar la batería
- ★★★★★Alfredo Calvo:
Gracias por su atención y paciencia a la hora de elegir la batería
- ★★★★★Alvaro Ruiz:
Puedes llamar, la asesoría es gratis y te ayudan a elegir batería y con la instalación
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 referenceas your bike's original — fits first time
- Sealed and ready to useno acid handling, no refills
- Survives winter storageholds charge through long off-season
JIS code
12N7-3B, 12N7-4A, YB7A, YB7LB, YB9LA2, YB9B, YB9LB2, 12N9-3B
Voltage
12 V
Capacity
11 Ah
Cold cranking
140 A
Dimensions
136×76×133 mm
Technology
AGM Quadflex
Weight
3,35 kg
Model
MOTOBATT QUADFLEX
Mfr. reference
MB9U
Motorcycle battery Motobatt 12N7-3B Quadflex 11Ah 140A 12V
Equivalent JIS codes12N7-3B12N7-4AYB7AYB7LBYB9LA2YB9BYB9LB212N9-3B
12VVoltage
11AhCapacity
140ACold cranking
3.35kgWeight
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 × 76 × 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 × 76 × 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 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.
BCOM-MOTOBATT-MB9U
Data sheet
- Brand
- MOTOBATT
- Reference
- MB9U
- Model
- MOTOBATT QUADFLEX
- Voltage (V)
- 12
- Length
- 136.00 mm
- Width
- 76.00 mm
- Height
- 133.00 mm
- Weight
- 3.35 Kgs
- Technology
- Quadflex
- JIS
- 12N7-3B 12N7-4A YB7A YB7LB YB9LA2 YB9B YB9LB2 12N9-3B
- Cold cranking amps (EN)
- 140A
- Capacity (C20)
- 11Ah (c20)
- Capacity (C10)
- 11Ah (c10)
Specific References
- MPN
- MB9U
4,79/5
Verified purchasesLatest verified reviews
★★★★★Tomas Suarez
06/07/2026Me ayudaron en la elección de mi batería
Gracias a vuestra ayuda pude instalar la batería
★★★★★Alfredo Calvo
30/04/2026Servicio impecable
Gracias por su atención y paciencia a la hora de elegir la batería
★★★★★Alvaro Ruiz
06/02/2026Gracias
Puedes llamar, la asesoría es gratis y te ayudan a elegir batería y con la instalación
★★★★★Raul Cruz
22/01/2026Recomendable
Gracias a vosotros pude elegir la batería de coche correcta
★★★★★Victor Gutierrez
14/01/2026Recomendado
No tenía ni idea de cómo instalar la batería en mi coche y me ayudaron de principio a fin. Muchas gracias
★★★★★Carlos Herrero
09/01/2026Buen sitio
Llevaba tiempo buscando la batería a un mejor precio y aquí la encontre, llego rapido y todo bien.
★★★★★Pedro MuÑoz
02/01/2026Asesoramiento increíble
Agradezco que me asesoraran de cómo instalar la batería que compré
★★★★★Cesar Prieto
27/12/2025La entrega en tiempo y forma
Me llego en tiempo y todo bien
★★★★★Jose Angel Castro
27/10/2025Buen asesoramiento
Gracias a vuestra ayuda pude instalar la bateria
Recommended accessories
How to change the battery
Guide to replace your motorcycle battery in 10-15 minutes. Motorcycle batteries are light (2-5 kg) and usually need an 8 mm wrench.
Step 1. Prepare the vehicle
Park on a flat surface, switch off the engine and remove the key. Make sure all lights and electrical accessories are off. Wait 1-2 minutes before starting.
Step 2. Locate the battery compartment
On motorcycles it is usually under the seat, in the rear cowl or behind a side panel. Check the manual — access varies a lot between models.
Step 3. Disconnect the negative (−) terminal
Use the 10 mm wrench to loosen the negative cable nut (black, marked −) and remove the cable from the post. Move it aside so it cannot touch any bodywork.
Step 4. Disconnect the positive (+) terminal
Repeat with the positive cable (red, marked +). Important: never let a terminal touch metal of the car while the other is still connected.
Step 5. Remove the old battery
Loosen the hold-down clamp or the straps that secure it. Lift the battery carefully — typical weight 2-5 kg. Check the terminals are not corroded before fitting the new one.
Step 6. Install the new battery
Place the battery in the same orientation as the old one (positive terminal on the same side). Tighten the hold-down clamp firmly.
Step 7. Connect the cables
Connect the positive (+) terminal first, then the negative (−). Tighten the nuts with the wrench until each terminal does not move. Apply anti-spark grease if you have any.
Step 8. Verify the engine starts
Close the bonnet. Start the engine to confirm everything works. On cars with Start-Stop or a BMS, you may need to register the battery via OBD so the alternator applies the correct charging profile.
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 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.
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 × width × height) are 136×76×133 mm — also written as 136x76x133 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.
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 — 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 — 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.
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