Fulbat 51814 · Motorcycle battery 12V 18Ah 210A
Specifications
| Brand | FULBAT |
|---|---|
| Part number | 51814 |
| Voltage (V) | 12V |
| Capacity (C20) | 18Ah |
| Technology | Lead-acid |
| Length | 186mm |
| Width | 82mm |
| Height | 171mm |
| Terminal layout | Positive right |
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Fulbat 51814 12V 18Ah 210A 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
18 Ah
Cold cranking
210 A
Dimensions
186×82×171 mm
Technology
Lead-acid
Polarity
Positive on the right
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Motorcycle battery Fulbat 51814 18Ah 210A 12V
12VVoltage
18AhCapacity
210ACold cranking
With 18 Ah at 12 V and 210 A of cold cranking current (EN), the Fulbat 51814 with conventional lead-acid technology replaces the original battery of motorcycles, scooters, quads and personal watercraft. Its 186 × 82 × 171 mm and the positive terminal on the right make it the exact replacement for the 18 Ah battery fitted as standard to many motorcycles.
- Sealed and ready to fit, no acid handling.
- Good balance of capacity, cranking power and price.
- Compact and lightweight format.
- Holds its charge through winter storage.
Dimensions, polarity and mounting
In terms of format, the Fulbat 51814 measures 186 × 82 × 171 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.
What the Fulbat 51814 is for
Designed for motorcycles, scooters, quads and personal watercraft, the Fulbat 51814 replaces the original battery of bikes that use this code or format. Check the position of the positive terminal before ordering.
Technology inside the Fulbat 51814
The 51814 is one of the Fulbat references for this type of use; it shares the same manufacturing and quality-control criteria as the rest of the brand's catalogue.
The conventional lead-acid battery remains the most widespread technology thanks to its balance of capacity, cranking current and price. Well maintained and kept charged, it offers years of reliable service in vehicles without Start-Stop.
Fulbat: the maker behind the 51814
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. 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 Fulbat 51814 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.
Usage and maintenance tips
Check the resting voltage before the season (above 12.6 V on a charged battery) and make sure the terminals are clean and tight. If the bike spends the winter standing, connect a trickle charger: deep discharge through inactivity is the first cause of premature failure.
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.
BCOM-FULBAT-51814
Data sheet
- Brand
- FULBAT
- Model
- FULBAT Motorcycle DRY
- Voltage (V)
- 12V
- Length
- 186mm
- Width
- 82mm
- Height
- 171mm
- Technology
- Lead-acid
- Terminal layout
- Positive right
- Cold cranking amps (EN)
- 210A
- Capacity (C20)
- 18Ah
Specific References
- MPN
- 51814
Comparison: Fulbat 51814 vs equivalents
The Fulbat 51814 is interchangeable with these equivalent references: GEL12-19 (Exide), 519901017 (Varta), 519013017 (Varta), 518014015 (Varta), 12Y16A-3A (Exide).
| Product | Specifications | Technology | Price |
|---|---|---|---|
Fulbat
51814
This battery
|
|||
Exide
GEL12-19
|
12V 19Ah 170A | Gel | €73.95 |
Varta
519901017
|
12V 19Ah 170A | Gel | €97.20 |
Varta
519013017
|
12V 19Ah 100A | Lead-acid | €146.20 |
Varta
518014015
|
12V 18Ah 100A | Lead-acid | €145.60 |
Exide
12Y16A-3A
|
12V 20Ah 210A | Lead-acid | €72.70 |
Equivalences verified by our technical team: same dimensions, polarity, capacity and CCA. Official manufacturer warranty on every option.
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 do I fit the 51814 model in my motorcycle?
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 51814 model?
Expected lifespan of the Fulbat 51814 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 dimensions of the Fulbat 51814 battery?
Dimensions (length × width × height) are 186×82×171 mm — also written as 186x82x171 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 51814 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 51814 typically fits a wide range of European vehicles thanks to its standard DIN case format.
What are the equivalents of the 51814 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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