Running Bull AGM batteries are the ideal 12V starter and on-board batteries for many electric cars (and hybrid models).

Optimal also as an upgrade with regard to higher power requirements (capacity and/or cold start) or technology (in DIN Europabox H4/L1, H5/L2, H6/L3, H7/L4, H8/L5 and H9/L6).


In general, it is advisable to upgrade to an AGM battery, which is far more resistant to cycling and vibration.

Especially if you have a large number of additional electrical consumers, maximum vibration/cycle resistance and optimum on-board network stability. This is because the thermal load on the 12V battery due to the effects of heat is negligible here - in direct comparison with an internal combustion engine, electric drives emit little heat loss to the environment due to their high efficiency.

A practical example briefly noted: In the all-electric VW ID.3, the conventional 12V wet battery or EFB battery can be replaced by an AGM battery in identical Box H4/L1 - in the example case by a Running Bull AGM 550 01.


Good to know.

The 12V on-board battery supplies the following power consumers during operation: alarm system, on-board computer, driver assistance systems, instruments including interior light, navigation system, headlights, sound system, central locking, ...

Furthermore, in the event of failure of the HV battery (HV = high voltage): Brakes including amplifier, interior light, windscreen washer system, headlights and power steering.

The high-voltage power consumers are briefly noted: interior auxiliary heater, air-conditioning compressor and coolant auxiliary heater.

With the AGM battery, it is essential to avoid a "build-up" of the thermal load due to (extremely) high ambient temperatures (thermal runaway).

For this reason, the ambient temperature must not exceed +55 degrees Celsius. +85 degrees Celsius, not an uncommon value especially in summer, is considered uncritical for a maximum of 3 hours per day. Otherwise, this can cause the premature total failure of the AGM battery, because the separator dries out and the grids can become extremely corroded!


Directly next to the engine block of a hybrid (combustion engine), the more heat-resistant EFB battery - with fitted thermal protection cover - is to be preferred if this was already installed ex works as the original battery.

The situation is completely different if the battery is installed in the boot (e.g. in many BMW models) or in the passenger compartment; an upgrade to an AGM battery is then highly recommended. This is because the thermal load on the battery due to heat is negligible here, in direct comparison with the engine compartment.


The same applies to an electrical system battery in an electric car, because electric drives emit very little heat to the environment due to their high efficiency.

Due to the ongoing optimisation of electric cars, the 12V on-board battery in use can change in the year of manufacture. An electric car equipped with a conventional wet battery ex works can be upgraded to an AGM battery in the course of the following years.

Please accept the marketing cookies to see the content