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Fulbat FB4L-B GEL · Motorcycle battery 12V 5.3Ah 50A GEL

Specifications

BrandFULBAT
Part numberFB4L-B GEL
Voltage (V)12V
Capacity (C20)5.30Ah
Capacity (C10)5Ah (c10)
Cold cranking amps (EN)50A
TechnologyGEL
Length120mm
Width70mm
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Price: €31.36
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  • 14-day returns
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Brand: Fulbat batteries Part number: FB4L-B GEL

Fulbat FB4L-B GEL 12V 5,3Ah 50A 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
Voltage
12 V
Capacity
5,3 Ah C20
Cold cranking
50 A EN-1
Dimensions
120×70×92 mm
Technology
GEL
Polarity
Positive on the right
Logo Fulbat

Motorcycle battery Fulbat FB4L-B 5.3Ah 50A 12V

12VVoltage
5.3AhCapacity
50ACold cranking

With 5.3 Ah at 12 V and 50 A of cold cranking current (EN), the Fulbat FB4L-B with GEL technology replaces the original battery of motorcycles, scooters, quads and personal watercraft. Measuring 120 × 70 × 92 mm and the positive terminal on the right, it is the direct replacement for motorcycles fitted from the factory with a 5.3 Ah battery of this format.

  • GEL: excellent resistance to deep discharge and long cycle life.
  • Sealed and ready to fit, no acid handling.
  • Holds its charge through winter storage.
  • Compact and lightweight format.

What the Fulbat FB4L-B is for

With 5.3 Ah, the Fulbat FB4L-B covers the starting of motorcycles, scooters, quads and personal watercraft. The JIS code on your current battery label is the safest way to confirm equivalence.

Will it fit your current battery tray?

In terms of format, the Fulbat FB4L-B measures 120 × 70 × 92 mm (length × width × height). The positive terminal on the right decides which side the cables end up on: it is the detail that causes most buying mistakes, so check it before ordering. Checking the three dimensions and the terminal position before buying avoids the most common mistake when replacing a battery.

Why choose Fulbat batteries

Fulbat has manufactured in France since 1978 and specialises in motorcycles and light vehicles. Its catalogue is short and clear, covers almost the whole fleet and works only with sealed, leak-free batteries. We guarantee that every Fulbat arrives new, charged and with the manufacturer's full warranty.

Technology inside the Fulbat FB4L-B

Fulbat builds the FB4L-B to the same standards as the rest of its catalogue; what changes between references is capacity, format and terminal position.

GEL technology fixes the acid in a solid gel. That removes maintenance and leaks and gives very long cycle life, in exchange for slightly slower recharging and lower peak current than an AGM.

Care and maintenance

GEL batteries need lower charging voltages: always use a charger with a GEL mode so as not to damage the electrolyte. If the bike spends the winter standing, connect a trickle charger: deep discharge through inactivity is the first cause of premature failure.

Manufacturer's warranty

The Fulbat FB4L-B 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

Order before 6:00 pm with stock available and it leaves today: mainland Spain and Portugal receive it in 24-48 working hours, the islands and the rest of the EU in 3 to 5 days. You have 14 days to return it if it has not been installed, with free collection on the mainland, and shipment tracking by email.

  • Reference
    BCOM-FULBAT-FB4L-B GEL

Data sheet

  • Brand
    FULBAT
  • Model
    FULBAT Motorcycle GEL
  • Voltage (V)
    12V
  • Length
    120mm
  • Width
    70mm
  • Height
    92mm
  • Technology
    GEL
  • Terminal layout
    Positive right
  • Cold cranking amps (EN)
    50A
  • Capacity (C20)
    5.30Ah
  • Capacity (C10)
    5Ah (c10)

Specific References

  • MPN
    FB4L-B GEL

Recommended accessories — complement the Fulbat FB4L-B GEL with a charger or tester

Frequently asked questions

How is the Fulbat FB4L-B GEL 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 — 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.

How long does the Fulbat FB4L-B GEL battery last?

Expected lifespan of the Fulbat FB4L-B GEL 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 FB4L-B GEL model?

Dimensions (length × width × height) are 120×70×92 mm — also written as 120x70x92 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 FB4L-B GEL 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 FB4L-B GEL typically fits a wide range of European vehicles thanks to its standard DIN case format.

What are the equivalents of the FB4L-B GEL 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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