Varta B24 · Car battery 12V 45Ah 300A

Varta B24 Dynamic SLI (formerly Black Dynamic) 45Ah 300A 12V Car Battery

The Varta B24 car battery is the 12 V, 45 Ah model with 300 A of cold cranking power (EN) from Varta's Dynamic SLI (formerly Black Dynamic) range, intended for cars with conventional starting, without a Start-Stop system. It replaces the original battery with no modifications in cars using the 219 × 135 × 225 mm format: the same 45 Ah capacity and the same terminal layout (positive on the left).

• Direct replacement for the original battery in cars without Start-Stop.
• Reliable cold starting thanks to its high cranking current.
• Long service life with normal use and a charging system in good order.
• Maintenance-free lead-acid technology: no topping up with water.

Vehicles compatible with the Varta B24 battery

The Varta B24 is compatible with more than 20 vehicles: it is fitted as standard or as a replacement by brands such as Morgan, Talbot, Austin, Reliant, Hyundai and Rover. It is a go-to option when you need a battery for a Morgan, Talbot or other models that use this same format. It also appears as a replacement in vehicles from Morris and Bedford, among other manufacturers. It has been cross-checked against 6 original equipment references from different manufacturers. Not sure whether it is the one for your car? Check in seconds by entering your registration in our finder.

Format and fitting of the Varta B24

The Varta B24 is made in the 219 × 135 × 225 mm format and weighs 10,8 kg. The positive terminal on the left determines which side the cables end up on: it is the detail that causes the most buying mistakes, so it is worth checking before you order. It uses a B01 hold-down and terminal 1, 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 error when replacing a battery.

The Varta B24 and the Dynamic SLI range

The Dynamic SLI is Varta's entry range for vehicles with traditional starting (without Start-Stop), bringing what used to be the Blue, Silver and Black Dynamic series together under a single name by technology. Its lead-calcium construction with optimised separators puts the emphasis on punchy starting and a long, maintenance-free life.

It covers the vast majority of conventional petrol and diesel cars on the European market. It is the sensible choice when you want German manufacturing quality without paying the premium for AGM or EFB technology the vehicle does not need.

Compared with an EFB or AGM Start-Stop battery, this range puts the emphasis on a keen price and punchy starting in conventional cars. With proper care — avoiding deep discharges and checking the alternator — a battery from this series delivers several years of trouble-free service. This battery used to belong to Varta's Black Dynamic, Silver Dynamic or Black Dynamic range; following the brand's commercial renaming (2025), it forms part of the new Dynamic SLI series.

Why choose a Varta battery

Manufactured by Clarios to German standards, Varta is one of the world's benchmark brands in starter batteries and an OEM supplier to the leading car makers. Choosing it as a replacement guarantees specifications equal to or better than the originals.

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.

More than 100 manufacturing parameters are checked on every Varta battery before it leaves the plant, a level of rigour that explains why so many workshops and manufacturers trust the brand as their first-choice replacement.

Manufacturer's warranty

The Varta B24 battery comes with the official manufacturer warranty.

Care and maintenance

To get the most out of it, keep the alternator in good order and avoid leaving lights or accessories on with the engine switched off. Repeated very short journeys are its main enemy: they stop the battery from recharging fully and shorten its life. If the car is going to stand unused for weeks, it is worth disconnecting the terminal or using a trickle charger so it does not drop below the safe threshold. Making sure the terminals are clean and properly tightened also helps towards reliable starting.