Varta J8 · Truck battery 12V 135Ah 680A

Varta J8 ProMotive SLI (formerly ProMotive HD) 135Ah 680A 12V Lorry Battery

The Varta J8 lorry battery is the 12 V, 135 Ah model delivering 680 A of cold cranking power (EN), from Varta's ProMotive SLI (formerly ProMotive HD) range, designed for lorries, buses, large vans and machinery. Measuring 360 × 253 × 240 mm, it is the direct replacement for lorries that leave the factory with a 135 Ah battery in this format.

• Reinforced grids and casing for the severe demands of haulage.
• Dependable through repeated starts and while powering cab equipment.
• High cranking current for large-capacity diesel engines.
• Withstands the vibration of thousands of kilometres on the road.

Vehicles compatible with the Varta J8 battery

This battery is listed as compatible with more than 296 vehicles from manufacturers such as Case International, Volvo, Atlas, Case, Akerman and Ford. For anyone who needs to change the battery in their Case International or Volvo, this Varta J8 reproduces the original specifications. It also appears as a replacement in vehicles from New Holland, O&k, Fahr, Challenger, Sperry New Holland, Ahlmann, Bührer and åkerman-Volvo, among other manufacturers.

Format and fitting of the Varta J8

The Varta J8 is made in the 360 × 253 × 240 mm format and weighs 35.46 kg. It takes a B11 hold-down and terminal 1, 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 J8 and the ProMotive SLI range

The ProMotive SLI range is Varta's starter series for commercial vehicles — lorries, buses and machinery — and in the new portfolio it unifies the former ProMotive HD (Heavy Duty) and SHD (Super Heavy Duty). It offers high cranking current for large-capacity diesel engines and a reinforced construction.

Its reinforced grids and separators stand up to the vibration and cycling of long-distance haulage and of the most severe use, aiming for maximum service life and starting reliability in fleets that work long hours.

Compared with a car battery, this range is calibrated for severe, continuous use: greater mechanical strength and more tolerance of cycling and of the knocks of the road. It is the correct replacement for a lorry, bus or machine working long shifts. This battery used to belong to Varta's ProMotive HD or ProMotive SHD range; following the brand's commercial renaming (2025), it now forms part of the new ProMotive SLI series.

Why choose a Varta battery

When a workshop recommends Varta it is not doing so out of marketing: it is one of the brands with the lowest return rates in the sector, and its application coverage takes in practically the whole European fleet, from the small hatchback to the commercial vehicle.

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 J8 battery comes with the official manufacturer warranty. An important warning for commercial vehicles: most lorries run two batteries connected in series (a 24 V installation). If you replace only one, the new battery ends up working alongside the old one — which has already lost capacity and has higher internal resistance — and that imbalance means one overcharges while the other falls short, shortens the life of the new unit and may be treated by the manufacturer as improper use, voiding the warranty. That is why it is always advisable to change both batteries at the same time.

Care and maintenance

In professional use, checking the state of charge and the battery hold-down regularly prevents breakdowns on the road. Vibration and the high temperatures of the engine bay are what shortens a battery's life most, so secure mounting is key. Keeping the terminals clean and tight and checking the charging system extends battery life in vehicles that clock up long hours. A well-maintained battery reduces the risk of downtime caused by a battery that will not start the engine.