Varta YTX24HL · Motorcycle battery 12V 21Ah 330A AGM

Varta YTX24HL Powersports AGM Active (formerly Powersports AGM High Performance) 21Ah 330A 12V Motorcycle Battery

The Varta YTX24HL motorcycle battery (reference 521909033) is the 12 V, 21 Ah model delivering 330 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. It replaces the original battery in motorcycles with the 205 × 87 × 162 mm format without any modifications: the same 21 Ah capacity and the same terminal layout (positive on the right).

• 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 YTX24HL battery

With 21 Ah, the Varta YTX24HL is sized for motorcycles, scooters, quads and personal watercraft, as a direct replacement for the original battery. 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 YTX24HL

Its external dimensions are 205 × 87 × 162 mm. 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. It uses a B00 hold-down, the system that secures it to the vehicle's battery tray. For the replacement to be a direct fit, the space taken by your current battery must respect those three dimensions and the same terminal layout; otherwise adapters will be needed or the hold-down will change.

The Varta YTX24HL 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'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 YTX24HL 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.