# Motorcycle battery Varta YTX4L-4 (503909005) 12V 3Ah 50A AGM ![Motorcycle battery Varta YTX4L-4 (503909005) 12V 3Ah 50A AGM](https://baterias.com/5824-home_default/battery-varta-motorcycle-12v-3ah-ytx4l-4-fa-503909005.jpg) > Varta YTX4L-4 motorcycle battery 12V 3Ah 50A AGM. Official Varta Distributor. Ref. 503909005. PowerSports AGM Active range. Verified OEM fitment. **Category:** [Motorcycle Batteries](https://baterias.com/gb/motorcycle-batteries) → [VARTA](https://baterias.com/gb/varta) - **Canonical URL**: https://baterias.com/gb/battery-varta-motorcycle-12v-3ah-ytx4l-4-fa-503909005 - **Language**: en-GB - **Brand**: VARTA - **Reference**: BCOM-VARTA-503909005 - **EAN**: 4016987168899 - **MPN**: 503909005 - **Price**: 33,60 € - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | VARTA | | Reference | 503909005 | | Model | Powersports AGM Active (antes Powersports AGM High Performance) | | Voltage (V) | 12 V | | Largo | 113 mm | | Ancho | 70 mm | | Alto | 87 mm | | Tecnología | AGM | | EAN | 4016987168899 | | Terminal layout | Positive terminal on the right | | JIS | YTX4 L-4 | | Hold down | B00 | | Cold cranking amps (EN) | 50 A | | Capacity (C20) | 3 Ah (c20) | | ETN | 503909005A512 | ## Quick description **Varta YTX4L-4 12V 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 reference** as your bike's original — fits first time - **Sealed and ready to use** no acid handling, no refills - **Survives winter storage** holds charge through long off-season 🏍️ JIS code YTX4L-4 🔌 Voltage 12 V ⚡ Capacity 3 Ah C20 🔋 Cold cranking 50 A EN-1 📏 Dimensions 113×70×87 mm ⚙️ Technology AGM 🧭 Polarity Positivo a la derecha ⚖️ Weight 1,4 kg 🏷️ Model PowerSports AGM Active #️⃣ Mfr. reference 503909005 ## Description ## Varta YTX4L-4 Powersports AGM Active (formerly Powersports AGM High Performance) 3Ah 50A 12V Motorcycle Battery JIS code YTX4L-4 12*V* Voltage 3*Ah* Capacity 50*A* Cold cranking The **Varta YTX4L-4 motorcycle battery** (reference 503909005) is the **12 V**, **3 Ah** model delivering **50 A** of cold cranking power (EN), from Varta's **Powersports AGM Active (formerly Powersports AGM High Performance)** range, designed for motorcycles, scooters, quads and personal watercraft. Its 113 × 70 × 87 mm dimensions and positive terminal on the right make it the exact replacement for the 3 Ah battery fitted as standard in many motorcycles. - 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. ### Vehicles compatible with the Varta YTX4L-4 battery This battery is listed as compatible with more than 324 vehicles from manufacturers such as MBK, Peugeot, Yamaha, Gilera, Aprilia Motorcycles and KTM. It is a go-to choice when you need a **battery for an MBK**, a Peugeot or other models built around this same format. The compatibility list also includes models from Sachs, Derbi, Malaguti, Piaggio, Hyosung, Honda, Suzuki and Italjet. Not sure whether it is the right one for your bike? Check in seconds by entering your **registration number** in our finder. ### Format and fitting of the Varta YTX4L-4 The Varta YTX4L-4 is made in the 113 × 70 × 87 mm format. The positive terminal on the right determines which side the cables sit on: it is the detail that causes the most buying mistakes, so it is worth checking before you order. It uses a B00 hold-down, the system that anchors it to the vehicle's battery tray. Before replacing it, measure the space your current battery occupies: if it matches on all three dimensions and on terminal position, the swap is direct and needs no adapters. ### The Varta YTX4L-4 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 Choosing Varta means going with the reference the car manufacturer itself signed off in the first place. Against own-brand batteries, the difference is not the purchase price but how many winters the battery lasts before it leaves you stranded. 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's production combines automated lines with verification of more than 100 parameters per unit; that traceability is what underpins its reputation for reliable starting throughout the battery's life. ### Manufacturer's warranty The Varta YTX4L-4 battery comes with **a 6-month official warranty** from the manufacturer. ### 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. [Download technical sheet (PDF)](/fichastecnicas/data-sheet-battery-varta-503909005-ytx4l-4-3ah-50a-12v-en.pdf) ## Frequently asked questions ### Is the Varta YTX4L-4 an AGM battery and what are the benefits of AGM? Yes. The YTX4L-4 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 do I know if the YTX4L-4 model fits my motorcycle? Three ways: 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 for the YTX4L-4; 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)). ### 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 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 months of warranty does the YTX4L-4 motorcycle model cover? This motorcycle battery includes 6 months of official manufacturer warranty against manufacturing defects. It is normal that warranty is shorter on bikes, jet skis and quads: the use pattern (with prolonged standstills) accelerates the battery's natural sulfation. Practical tip: connect a trickle charger if the bike will be idle for more than 2 weeks — it dramatically extends battery life. ### How long does Varta YTX4L-4 delivery take? In mainland Spain and Portugal it arrives in 24 h if you order before 6:00 pm and the battery is in stock — it leaves the same day and arrives the next business day. Afternoon or weekend orders ship the next business day. For Balearics, Canaries and other EU destinations, allow 2-5 days. Shipping cost is calculated in the cart based on destination and service (standard, express, cash on delivery). Tracking number is sent by email + SMS as soon as the parcel ships. ### Can I return the Varta YTX4L-4 battery if it doesn't fit or doesn't work? Yes. You have 14 days from delivery to return it. In mainland Spain and Portugal returns are FREE — we cover the return shipping cost via prepaid label. In other EU countries the return shipping cost is the customer's. It must arrive in its original packaging with no signs of installation. If it was defective, the warranty covers replacement even after the 14-day period. ### How much does the Varta YTX4L-4 battery cost? The current price at baterias.com is 33,60 € (VAT included; 27,77 € excl. VAT), updated every 24 hours. The applicable VAT may vary with the destination country and is confirmed in the cart. Shipping cost is calculated in the cart based on destination and chosen service (standard, express, cash on delivery). ### Where can I buy the Varta YTX4L-4 battery? At baterias.com — authorised distributor with real stock, Express 24h delivery in mainland Spain and Portugal if you order before 6:00 pm, and full manufacturer warranty. Shipping cost is calculated in the cart based on destination and chosen service (standard, express, cash on delivery). Secure payment by card, Bizum, PayPal or bank transfer. If you choose at-home installation, our technician will take the used battery and dispose of it through an authorised collection point. ### How long does the Varta YTX4L-4 battery last? Expected lifespan of the Varta YTX4L-4 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 YTX4L-4 model? Dimensions (length × width × height) are 113×70×87 mm — also written as 113x70x87 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. ### How much does the Varta YTX4L-4 battery weigh? It weighs 1,4 kg. Most of the weight is lead. If you plan to fit it yourself, use gloves and a carrying strap (AGM batteries are slightly heavier than conventional due to the absorbent glass-mat fibre). ### Will the Varta YTX4L-4 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 YTX4L-4 fits 324 verified vehicle versions in our database. ### Which batteries are equivalent to the Varta YTX4L-4? 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. ### Which is better: Varta YTX4L-4 or an alternative from another brand? This battery and its equivalents from Bosch, Tudor or Exide are technically comparable: same dimensions, same voltage and same capacity. The differences are warranty (Varta and Bosch: 2 years; Tudor and Exide: 2 years on the equivalent line), manufacturing plant (Varta and Bosch share origin in the Clarios Group; Tudor and Exide belong to Exide Technologies) and price. For private use any of these brands will give 4-6 years of life. Compare them in the "Equivalents" section. ### What reviews does the YTX4L-4 model have? The average rating of the Varta YTX4L-4 on baterias.com is 4.76/5 from 39 verified customer reviews. The product rating, when available, is shown on the product page next to the stars. You can also check our public Trustpilot profile at shop level (4.5/5 from 11,700+ verified reviews). Most-praised points: reliable cold start, lifespan above 5 years and fast delivery; most common complaints mention BMS-equipped motorcycles that need OBD registration after fitting. ## Compatible vehicles This battery fits 324 vehicles. Most searched: - [YAMAHA AEROX (1990)](https://baterias.com/gb/motorcycle-batteries/yamaha/aerox) - [KTM EXC (1990)](https://baterias.com/gb/motorcycle-batteries/ktm/exc) - [YAMAHA NEOS (1990)](https://baterias.com/gb/motorcycle-batteries/yamaha/neos) - [PEUGEOT SPEEDFIGHT (1990)](https://baterias.com/gb/motorcycle-batteries/peugeot/speedfight) - [GILERA RUNNER (1990)](https://baterias.com/gb/motorcycle-batteries/gilera/runner) - [PIAGGIO ZIP (1990)](https://baterias.com/gb/motorcycle-batteries/piaggio/zip) - [PEUGEOT LUDIX (1990)](https://baterias.com/gb/motorcycle-batteries/peugeot/ludix) - [APRILIA MOTORCYCLES SR (1990)](https://baterias.com/gb/motorcycle-batteries/aprilia-motorcycles/sr) - [YAMAHA BWs (1990)](https://baterias.com/gb/motorcycle-batteries/yamaha/bws) - [MBK BOOSTER (1990)](https://baterias.com/gb/motorcycle-batteries/mbk/booster) - [PIAGGIO LIBERTY (1990)](https://baterias.com/gb/motorcycle-batteries/piaggio/liberty) - [PIAGGIO NRG (1990)](https://baterias.com/gb/motorcycle-batteries/piaggio/nrg) - [SUZUKI DR (1990)](https://baterias.com/gb/motorcycle-batteries/suzuki/dr) - [MALAGUTI F (1990)](https://baterias.com/gb/motorcycle-batteries/malaguti/f) - [APRILIA MOTORCYCLES RS (1990)](https://baterias.com/gb/motorcycle-batteries/aprilia-motorcycles/rs) ## Equivalent batteries - [EXIDE AGM12-4](https://baterias.com/gb/battery-exide-agm12-4-12v-3ah-50a) - [EXIDE ETX4L-BS](https://baterias.com/gb/battery-exide-etx4l-bs-12v-3ah-50a) - [VARTA 503014003](https://baterias.com/gb/battery-varta-moto-12v-3ah-yt4l-4-yt4l-bs-503014003) ## Reviews - **Average rating**: 4.76 / 5 (39 reviews) ## Technical team (editorial authorship) The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team — over 25 years of experience validating automotive batteries. → https://baterias.com/gb/technical-team --- *baterias.com — Automotive batteries · 2026-09-26*