Varta M9 · Truck battery 12V 170Ah 1000A

Varta M9 ProMotive SLI (formerly ProMotive HD) 170Ah 1000A 12V Lorry Battery

The Varta M9 lorry battery is the 12 V, 170 Ah model delivering 1000 A of cold cranking power (EN) from Varta's ProMotive SLI (formerly ProMotive HD) range, designed for lorries, buses, large vans and machinery. Measuring 513 × 223 × 223 mm and with the positive terminal on the left, it is the direct replacement for lorries that leave the factory with a 170 Ah battery in this format.

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

Vehicles compatible with the Varta M9 battery

According to our database, the Varta M9 is fitted to more than 494 vehicles from brands such as Fiat, Case, Fendt, Carraro, Valmet and Valtra, among others. It is a go-to option when you need a Fiat battery, a Case one or any other model built around this same format. The compatibility list also includes models from Zetor, Same, Case International, Lamborghini, Steyr, Hurlimann, Volvo and Bolinders - Volvo.

Size and fitting of the Varta M9

The Varta M9 is made in the 513 × 223 × 223 mm format and weighs 45,1 kg. 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 B03 hold-down and a type 1 terminal, the system that anchors it to the vehicle's battery tray. Checking the three dimensions and the terminal position before buying avoids the most common mistake when replacing a battery.

The Varta M9 and the ProMotive SLI range

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

Its reinforced grids and separators cope with 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 passenger-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 putting in long days. This battery used to belong to Varta's ProMotive HD or ProMotive SHD range; following the brand's commercial renaming (2025), it forms part of the new ProMotive SLI series.

Why choose a Varta battery

Varta is an original equipment (OEM) supplier to a good share of Europe's car manufacturers: many cars leave the factory with a Varta fitted. Buying a replacement means, in most cases, refitting the original battery with the same quality and the brand's official warranty.

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 M9 battery comes with the official manufacturer warranty. One important warning for industrial vehicles: most lorries carry two batteries wired 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; that imbalance leaves one overcharged and the other short, shortens the life of the new unit, and the manufacturer may treat it as misuse and void 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 the factors that shorten its life the 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 no-start.