Varta YTX20H · Motorcycle battery 12V 18Ah 310A AGM

Varta YTX20H Powersports AGM Active (formerly Powersports AGM High Performance) 18Ah 310A 12V Motorcycle Battery

The Varta YTX20H motorcycle battery (reference 518909031) is the 12 V, 18 Ah model delivering 310 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. Measuring 176 × 89 × 154 mm and with the positive terminal on the left, it is the direct replacement for motorcycles fitted from the factory with an 18 Ah battery in this format.

• Construction built to withstand the vibration typical of two-wheelers.
• Direct replacement for the original motorbike, scooter or quad battery.
• High cranking peak in a compact, lightweight format.
• Performs well in the cold and after periods of inactivity.

Applications of the Varta YTX20H battery

Designed for motorcycles, scooters, quads and personal watercraft, the Varta YTX20H is a direct replacement when you need its same 18 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 YTX20H

Its external dimensions are 176 × 89 × 154 mm. 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. Checking the three dimensions and the terminal positions before buying avoids the most common mistake when replacing a battery.

The Varta YTX20H and the Powersports AGM Active range

The Powersports AGM Active range consists of AGM motorcycle batteries activated and charged at the factory, ready to fit. They combine the toughness of AGM technology with the convenience of immediate installation.

They are aimed at general motorcycle and scooter use, with reliable starting and no maintenance from day one.

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. 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

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 spanning practically the whole European fleet, from the small hatchback to the commercial vehicle.

Behind Varta is Clarios, one of the largest manufacturers of starter batteries in the world and a supplier to the assembly lines of numerous car brands. That German engineering heritage translates into reliable starting year after year.

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 YTX20H 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.