Motobatt mb2.5u Quadflex · Motorcycle battery 2.5Ah AGM
Specifications
| Brand | MOTOBATT |
|---|---|
| Part number | mb2.5u |
| Voltage (V) | 12 |
| Capacity (C20) | 2.5 |
| Capacity (C10) | 2 5Ah (c10) |
| Technology | Quadflex |
| Length | 80.00 mm |
| Width | 70.00 mm |
| Height | 105.00 mm |
Motobatt mb2.5u 12V 2Ah 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 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
Where it fits: the Motobatt mb2.5u is one of our motorcycle batteries, belongs to our Motobatt batteries and by capacity it sits among our 2Ah batteries.
The Motobatt mb2.5u in practice
mb2.5u vs Motobatt MBTX4U
The Motobatt mb2.5u offers 2 Ah and 0 A cold cranking in a 80 × 70 × 105 mm case. The Motobatt MBTX4U, same brand and technology, goes up to 4 Ah and 70 A with 34 mm more length and costs €283.00 less. The difference shows on diesels and in hard winters; for a daily-driven petrol car the extra is not needed.

Motorcycle battery Motobatt mb2.5u Quadflex 2.5Ah 12V
The Motobatt mb2.5u motorcycle battery is rated at 12 V, 2.5 Ah from the Quadflex range, and is designed for motorcycles, scooters, quads and personal watercraft. It replaces the original battery without adaptation in motorcycles with a 80 × 70 × 105 mm format: same 2.5 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 mb2.5u is for
The Motobatt mb2.5u 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 1.18 kg.
Dimensions, polarity and mounting
The Motobatt mb2.5u is made in the 80 × 70 × 105 mm format and weighs 1.18 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 mb2.5u
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. All the Motobatt batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty.
The Motobatt mb2.5u: Quadflex range and AGM technology
The Quadflex is the Motobatt range the mb2.5u 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 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.
How to make it last longer
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. Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators.
Manufacturer's warranty
The Motobatt mb2.5u 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.
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.
Other 2Ah batteries: We stock 24 models of 2 Ah to compare by price, technology and cold cranking: see all 2Ah batteries.
Recommended accessories
Frequently asked questions
How should this motorcycle battery be charged?
With a 12 V motorcycle charger delivering at most 10 % of its capacity: 0.5 A for its 2.5 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 mb2.5u battery last?
Expected lifespan of the Motobatt mb2.5u is 3 to 5 years, keeping it charged when the bike is not in use. 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 mb2.5u model?
Dimensions (length × width × height) are 80×70×105 mm — also written as 80x70x105 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.
Will the Motobatt mb2.5u 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 16:30–18:00 (Spanish time, CET)). The mb2.5u typically fits a wide range of European vehicles thanks to its standard DIN case format.
Which batteries are equivalent to the Motobatt mb2.5u?
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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