Varta YTX4L-4 · Motorcycle battery (503909005) 12V 3Ah 50A AGM

Varta YTX4L-4 Powersports AGM Active (formerly Powersports AGM High Performance) 3Ah 50A 12V Motorcycle Battery

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 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.