BMW Varta AGM Car Battery 12V 70Ah 720A 9381780 9878490

BMW Varta AGM Car Battery 12V 70Ah 720A is an original battery from the Batteries group, designed for BMW vehicles, featuring AGM technology and a nominal voltage of 12 V. This used OEM part ensures a factory-fit for the vehicle's electrical system and provides stable starting parameters suitable for modern onboard systems.

Specifications and technical data

• SKU: 9381780-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 9381780
• Substitutable numbers: 9381780, 9878490, 61219878490, 61219381780
• Category: Batteries

Technical characteristics of the BMW AGM battery

BMW Varta AGM Car Battery 12V 70Ah 720A utilizes AGM (Absorbent Glass Mat) technology, where the electrolyte is absorbed into glass fiber separators. This design promotes stable operation under high electrical loads, typical for vehicles with extensive electronics, start-stop systems, and numerous comfort features.

The 12 V battery with a capacity of 70 Ah and a high cold-cranking amperage is designed for reliable engine starting in various operating conditions. Using an OEM solution ensures proper compatibility with the charging system, energy management controllers, and battery monitoring systems in BMW cars.

Purpose and compatibility

The offered battery comes from a line dedicated to BMW vehicles, which means it maintains the appropriate electrical, dimensional, and connection parameters relative to factory equipment. As a result, installation in place of the previous battery is straightforward, without the need for system modifications or non-standard mounts.

The presence of the OEM part number and available replacement numbers in the technical specification facilitates verification of compatibility with a specific vehicle model. Before purchasing, it is recommended to compare the markings with service documentation or the removed part to ensure a correct fit for the car's electrical system.

Benefits of using an AGM battery in a BMW

AGM technology in batteries from the Batteries group is particularly recommended for vehicles with intensively used onboard electronics. This type of battery construction promotes:

• stable energy delivery under high electrical loads,
• efficient cooperation with start-stop and energy recovery systems (where applicable),
• maintenance of the appropriate voltage level for sensitive controllers and comfort modules,
• more uniform performance across a wide range of ambient temperatures.

For the user, this means more predictable electrical system behavior, reduced risk of starting issues, and better protection for sensitive electronic components. Original BMW origin also helps maintain consistency with factory energy management system settings.

Condition, origin, and installation aspects

The battery is offered as a used part, which allows for an economical battery replacement while maintaining the manufacturer's original specifications. This type of solution is often chosen for vehicles where compatibility with factory equipment and reducing operating costs are priorities.

During installation, it is recommended to follow the vehicle manufacturer's procedures, including proper terminal connection, checking ground points, and – if necessary – performing battery adaptation in the diagnostic system. Proper execution of these steps promotes longer and more stable operation of the entire electrical system.

Support in selection and power system expansion

If you are planning a comprehensive repair or upgrade of the electrical power system in your BMW and need other components from the same group, such as additional auxiliary batteries, energy storage units, or mounting elements, check the available parts in the BMW Batteries category.

For drivers interested in a broader look at drivetrain configuration and matching components to driving style, a guide article discussing the selection of axle ratios and differentials may be helpful – you can find it here: Dismantled drive axles and differentials – how to choose ratios for your driving style.