Varta YTZ10S · Motorcycle battery 12V 9Ah 150A AGM
Specifications
| Brand | VARTA |
|---|---|
| Part number | 508909015 |
| Voltage (V) | 12 |
| Capacity (C20) | 9Ah (c20) |
| Cold cranking amps (EN) | 150A |
| Technology | AGM |
| Length | 150 mm |
| Width | 87 mm |
| Height | 93 mm |
€59.50
VAT included
Varta YTZ10S 12V 9Ah 150A 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
JIS code
TZ10S, YTZ10S
Voltage
12 V
Capacity
9 Ah
Cold cranking
150 A
Dimensions
150×87×93 mm
Technology
AGM
Polarity
Positive on the left
Weight
3,15 kg
Model
PowerSports AGM Active
Mfr. reference
508909015
Varta YTZ10S Powersports AGM Active (formerly Powersports AGM High Performance) 9Ah 150A 12V Motorcycle Battery
JIS codeYTZ10S
12VVoltage
9AhCapacity
150ACold cranking
The Varta YTZ10S motorcycle battery (reference 508909015) is the 12 V, 9 Ah model delivering 150 A of cold cranking power (EN), from Varta's Powersports AGM Active (formerly Powersports AGM High Performance) from Varta, designed for motorcycles, scooters, quads and personal watercraft. With dimensions of 150 × 87 × 93 mm and the positive terminal on the left, it is the direct replacement for motorcycles fitted from the factory with a 9 Ah battery in this format.
- High cranking peak in a compact, lightweight format.
- Performs well in the cold and after periods of inactivity.
- Construction built to withstand the vibration typical of two-wheelers.
- Direct replacement for the original motorbike, scooter or quad battery.
Applications of the Varta YTZ10S battery
Designed for motorcycles, scooters, quads and personal watercraft, the Varta YTZ10S is a direct replacement when you need its same 9 Ah capacity and format. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a B00 hold-down.
Format and fitting of the Varta YTZ10S
In format, the Varta YTZ10S measures 150 × 87 × 93 mm (length × width × height). The positive terminal on the left determines which side the cables run to: it is the detail that causes the most buying mistakes, so it is worth checking before ordering. It uses a B00 hold-down, the system that secures it to the vehicle's battery tray. For the swap to be direct, the space your current battery occupies must respect those three dimensions and the same terminal layout; otherwise adapters will be needed or the hold-down will have to change.
The Varta YTZ10S and the Powersports AGM Active range
The Powersports AGM Active series is Varta's AGM motorcycle line that arrives activated and charged from the factory: it fits straight on, with no acid to add and no charging before use. It combines the ruggedness of AGM (resistance to vibration and to deep discharge) with the greatest possible ease of installation.
In the new portfolio it also absorbs the former high-performance versions (AGM High Performance), so it covers everything from general use to large-capacity, custom and trail bikes with heavy cranking demands.
On two wheels, vibration and extreme temperatures take a heavy toll on the battery. This range reinforces the internal plate mounting and seals the unit to withstand that use, delivering the instant burst of cranking power a motorbike or quad engine needs after weeks standing idle. This battery used to belong to Varta's Powersports AGM High Performance range; following the brand's change of commercial naming (2025), it now forms part of the new Powersports AGM Active series.
Why choose a Varta battery
A good share of the vehicles on Europe's roads left the factory with a Varta fitted: the brand has been supplying the assembly lines of the leading car groups for decades. Replacing with a Varta is, in practice, giving the vehicle back the battery its manufacturer intended.
Varta batteries are made under the Clarios group with German technology and quality controls that make them one of the best-selling choices in Europe. As a lead battery, it is 100% recyclable through any collection point.
Varta is Europe's leading manufacturer of starter batteries: its production volume and its quality controls guarantee consistent reliability batch after batch, something own-brand makes cannot always promise.
Manufacturer's warranty
The Varta YTZ10S 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.
BCOM-VARTA-508909015
Data sheet
- Brand
- VARTA
- Reference
- 508909015
- Model
- Varta Powersports AGM Active
- Voltage (V)
- 12
- Length
- 150 mm
- Width
- 87 mm
- Height
- 93 mm
- Technology
- AGM
- EAN
- 4016987169926
- Terminal layout
- Positive terminal on the left
- JIS
- YTZ10S
- Hold-down
- B00
- Cold cranking amps (EN)
- 150A
- Capacity (C20)
- 9Ah (c20)
- Additional ETN
- 508909015K542
Specific References
- EAN13
- 4016987169926
- MPN
- 508909015
Codes and references Varta 508909015
| Brand | Varta · see all Varta batteries |
|---|---|
| Manufacturer range | Powersports AGM Active (formerly Powersports AGM High Performance) |
| Manufacturer part number (MPN) | 508909015 |
| Also known as | Varta Powersports AGM High Performance 508909015 · Varta Powersports AGM Active 508909015 |
| JIS equivalents | TZ10S · YTZ10S |
| EAN-13 barcode | 4016987169926 |
| Dimensions (length × width × height) | 150 × 87 × 93 mm (150x87x93) |
Comparison: Varta 508909015 vs equivalents
The Varta 508909015 is interchangeable with these equivalent references: ETZ10-BS (Exide).
| Product | Specifications | Technology | Price |
|---|---|---|---|
Varta
508909015
This battery
|
12V 9Ah 150A | AGM | €59.50 |
Exide
ETZ10-BS
|
12V 9Ah 145A | AGM | €34.10 |
Equivalences verified by our technical team: same dimensions, polarity, capacity and CCA. Official manufacturer warranty on every option.
Recommended accessories
Compatible vehicles
The Varta 508909015 fits 49 vehicles. Most searched below:
HONDACBR1990KAWASAKIZ1990HONDACBF1990YAMAHAMT1990YAMAHAYZF-R1990KTMSUPERMOTO1990KTMDUKE1990BMWG1990MV AGUSTA MOTORCYCLEBRUTALE1990BMWS1990HUSQVARNA7011990KAWASAKIVULCAN1990
See all 49 compatible vehicles 
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
Is this battery AGM? What is it for?
Yes. The YTZ10S from Varta 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 Varta YTZ10S 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 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.
How many years does this battery last?
Expected lifespan of the Varta YTZ10S 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 measurements of the YTZ10S model?
Dimensions (length × width × height) are 150×87×93 mm — also written as 150x87x93 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 Varta YTZ10S 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 YTZ10S fits 49 verified vehicle versions in our database.
What are the equivalents of the YTZ10S 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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