Varta 51814 · Motorcycle battery (518014015) 12V 18Ah 100A
Specifications
| Brand | VARTA |
|---|---|
| Part number | 518014015 |
| Voltage (V) | 12 |
| Capacity (C20) | 18Ah (c20) |
| Capacity (C10) | 0Ah (c10) |
| Cold cranking amps (EN) | 100A |
| Technology | Lead-acid |
| Length | 186.00 mm |
| Width | 82.00 mm |
Varta 51814 12V 18Ah 100A 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

Varta 51814 Powersports SLI Freshpack 18Ah 100A 12V Motorcycle Battery
The Varta 51814 motorcycle battery (reference 518014015) is the 12 V, 18 Ah and 100 A cold cranking (EN) model from Varta's Powersports SLI Freshpack range, designed for motorcycles, scooters, quads and personal watercraft. Measuring 186 × 82 × 171 mm and with the positive terminal on the right, it is the direct replacement for motorcycles fitted from the factory with an 18 Ah battery in this format.
- Direct replacement for the original motorbike, scooter or quad battery.
- Construction built to withstand the vibration typical of two-wheelers.
- Performs well in the cold and after periods of inactivity.
- High cranking peak in a compact, lightweight format.
Applications of the Varta 51814 battery
The Varta 51814 covers the needs of motorcycles, scooters, quads and personal watercraft with 18 Ah of capacity and a construction built for that use. Check that it matches your current battery in dimensions, terminals and hold-down: this reference weighs 6,35 kg and has a Y10 terminal.
Format and fitting of the Varta 51814
The Varta 51814 is made in the 186 × 82 × 171 mm format and weighs 6,35 kg. The positive terminal on the right determines which side the cables end up on: it is the detail that causes the most purchasing mistakes, so it is worth checking before ordering. Checking the three dimensions and the terminal positions before buying avoids the most common mistake when replacing a battery.
The Varta 51814 and the Powersports SLI Freshpack range
The Powersports SLI Freshpack range brings together Varta's conventional motorcycle batteries, supplied dry with the acid packed separately (freshpack) so they are activated on installation, guaranteeing maximum freshness.
They deliver powerful starting and good vibration resistance for classic motorbikes, scooters and quads: the direct replacement for traditional lead-acid motorcycle batteries.
Unlike a car battery, what matters here is power density in a minimal size and resistance to vibration. It is the direct substitute for the original motorcycle battery, with the advantage of reliable starting even in the cold and after periods of inactivity.
Why choose a Varta battery
When a workshop recommends Varta it is not down to marketing: it is one of the brands with the lowest return rates in the sector, with an application coverage that spans practically the whole European fleet, from the city car to the commercial vehicle.
Varta combines more than a century of experience with Clarios's industrial production: it is the battery many manufacturers choose as standard and one of the most recommended by workshops. Like every lead-acid battery, it is 100% recyclable.
Varta is Europe's leading manufacturer of starter batteries: its production volume and quality controls guarantee consistent reliability batch after batch, something own-brand labels cannot always assure.
Manufacturer's warranty
The Varta 51814 battery comes with the official manufacturer warranty.
Care and maintenance
If the bike goes unused for long spells, a trickle charger greatly extends the battery's life and prevents sulphation. Storing it somewhere dry and checking the terminals at the start of each season helps it start first time. Motorcycle batteries suffer in the cold and when left idle: in winter, a maintenance charger stops the battery from discharging completely. With this care, it will typically deliver well over several years of service.
Technical sheet
Download the official technical sheet for this battery with all the manufacturer data.
Data sheet
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BrandVARTA
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Reference518014015
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ModelVarta Powersports SLI Freshpack
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Voltage (V)12
-
Length186.00 mm
-
Width82.00 mm
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Height171.00 mm
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Weight6.35 Kgs
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TechnologyLead-acid
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EAN4016987140543
-
Terminal layoutPositive terminal on the right
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Terminal typeY10
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JIS51814
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Cold cranking amps (EN)100A
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Capacity (C20)18Ah (c20)
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Capacity (C10)0Ah (c10)
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ETN518014015A514
Specific References
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EAN134016987140543
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MPN518014015
Codes and references Varta 518014015
| Brand | Varta · see all Varta batteries |
|---|---|
| Manufacturer range | Powersports SLI Freshpack |
| Manufacturer part number (MPN) | 518014015 |
| Also known as | Varta Powersports SLI Freshpack 518014015 |
| JIS equivalents | 51814 |
| ETN code | 518014015A514 (short form 518 014 015) |
| EAN-13 barcode | 4016987140543 |
| Dimensions (length × width × height) | 186 × 82 × 171 mm (186x82x171) |
Comparison: Varta 518014015 vs equivalents
The Varta 518014015 is interchangeable with these equivalent references: 519013017 (Varta).
| Product | Specifications | Technology | Price |
|---|---|---|---|
|
|
12V 18Ah 100A | Lead-acid | €145.60 |
|
|
12V 19Ah 100A | Lead-acid | €146.20 |
Equivalences verified by our technical team: same dimensions, polarity, capacity and CCA. Official manufacturer warranty on every option.
Recommended accessories
Frequently asked questions
How do I change this battery step by step?
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 right 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 Varta 51814 is 4 to 6 years in regular motorcycle use without 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 Varta 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.
On which side is the positive of the 51814 model?
Polarity: positive on the right. 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 Varta 51814 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 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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