Motobatt MBTX20U · Motorcycle battery 12V 21Ah 310A AGM
Motorcycle battery Motobatt MBTX20U 12V 21Ah 310A AGM images
Specifications
| Brand | MOTOBATT |
|---|---|
| Part number | MBTX20U |
| Voltage (V) | 12 |
| Capacity (C20) | 21Ah (c20) |
| Capacity (C10) | 21Ah (c10) |
| Cold cranking amps (EN) | 310A |
| Technology | Quadflex |
| Length | 175.00 mm |
| Width | 87.00 mm |
Motobatt MBTX20U 12V 21Ah 310A 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
Motorcycle battery Motobatt YTX20BS Quadflex 21Ah 310A 12V
With 21 Ah at 12 V and 310 A of cold cranking current (EN), the Motobatt YTX20BS with AGM technology replaces the original battery of motorcycles, scooters, quads and personal watercraft. It replaces the original battery without adaptation in motorcycles with a 175 × 87 × 155 mm format: same 21 Ah capacity.
- AGM technology: absorbed electrolyte, no spills, can be mounted at an angle.
- Same JIS code as the original battery: fits first time.
- Resistant to the vibration typical of two wheels.
- Energetic cranking for high-compression engines.
What the Motobatt YTX20BS is for
The Motobatt YTX20BS is a common replacement in motorcycles, scooters, quads and personal watercraft. If your bike spends the winter standing, a trickle charger stops it reaching spring flat. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 6.50 kg.
The Motobatt YTX20BS: Quadflex range and AGM technology
The Quadflex is the Motobatt range the YTX20BS belongs to: it shares the same construction and quality criteria with the rest of the series, and varies in capacity and format to suit each vehicle.
AGM (Absorbent Glass Mat) technology seals the electrolyte in glass microfibre. The result is a maintenance-free battery that is highly vibration-resistant and able to withstand deep discharges that would ruin a classic lead-acid battery.
Will it fit your current battery tray?
The Motobatt YTX20BS is made in the 175 × 87 × 155 mm format and weighs 6.50 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.
What Motobatt does differently
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. At baterias.com we work directly with the manufacturer or its official distributor: real stock, brand-new product and official warranty.
Usage and maintenance tips
Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators. Check the resting voltage before the season (above 12.6 V on a charged battery) and make sure the terminals are clean and tight.
Manufacturer's warranty
The Motobatt YTX20BS 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.
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ReferenceBCOM-MOTOBATT-MBTX20U
Data sheet
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BrandMOTOBATT
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ReferenceMBTX20U
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ModelMOTOBATT QUADFLEX
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Voltage (V)12
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Length175.00 mm
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Width87.00 mm
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Height155.00 mm
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Weight6.5 Kgs
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TechnologyQuadflex
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JISYTX20BS YTX20LBS YTX20HBS YB16B YB16LB YB16CLB
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Cold cranking amps (EN)310A
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Capacity (C20)21Ah (c20)
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Capacity (C10)21Ah (c10)
Specific References
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MPNMBTX20U
Codes and references Motobatt MBTX20U
| Brand | Motobatt |
|---|---|
| Manufacturer range | Powersports AGM |
| Manufacturer part number (MPN) | MBTX20U |
| Also known as | 518902026 · Motobatt Powersports AGM MBTX20U |
| JIS equivalents | YTX20BS · YTX20LBS · YTX20HBS · YB16B · YB16LB · YB16CLB |
| ETN code | 518902026A514 (short form 518 902 026) |
| Dimensions (length × width × height) | 175 × 87 × 155 mm (175x87x155) |
| Not to be confused with | FTX20-BS (different version) · ETX20H-BS (different version) · FTX20A-BS (different size) · ETX20HL-BS (reversed polarity) |
Comparison: Motobatt MBTX20U vs equivalents
The Motobatt MBTX20U is interchangeable with these equivalent references: MBTX20UHD (Motobatt).
| Product | Specifications | Technology | Price |
|---|---|---|---|
Motobatt
MBTX20U
This battery
|
12V 18Ah 250A | AGM | €149.20 |
Motobatt
MBTX20UHD
|
12V 18Ah 250A | AGM | €149.20 |
Equivalences verified by our technical team: same dimensions, polarity, capacity and CCA. Official manufacturer warranty on every option.
Recommended accessories
Compatible vehicles
The Motobatt MBTX20U fits 42 vehicles. Most searched below:
Frequently asked questions
Is this battery AGM? What is it for?
Yes. The YB16CLB from Motobatt uses AGM (Absorbent Glass Mat) technology: a sealed lead-acid battery where the electrolyte is absorbed in a glass-fibre mat. It withstands more charge/discharge cycles than a conventional one, handles heat better and is the required technology for motorcycles with advanced Start-Stop and regenerative braking. Expected lifespan: 5-8 years under normal conditions.
How is the Motobatt YB16CLB 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 (−) 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 — with positive on the left 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 YB16CLB model?
Expected lifespan of the Motobatt YB16CLB is 5 to 8 years in mild-climate motorcycle use with Start-Stop. 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 dimensions of the Motobatt YB16CLB battery?
Dimensions (length × width × height) are 175×87×155 mm — also written as 175x87x155 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 Motobatt YB16CLB battery have?
Polarity: positive on the left. 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.
Will the Motobatt YB16CLB battery fit my motorcycle?
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 YB16CLB fits 42 verified vehicle versions in our database.
What are the equivalents of the YB16CLB 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.
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