VARTA Dynamic AUX Batteries

Dynamic AUX batteries are auxiliary batteries: they do not start the engine, but power the vehicle's electronic systems when the engine is off or during the start itself.

Technology

They are compact units, in AGM or lead-acid depending on the reference, designed to stabilize the onboard electrical network. In vehicles with start-stop, they prevent the voltage drop during starting from restarting the radio, navigation system, or assistance systems. Many premium manufacturers install them as standard in an independent housing.

Applications

• Premium vehicles with start-stop and auxiliary battery as standard
• Onboard voltage stabilization systems
• Powering comfort electronics with the engine off
• Replacement of the original backup battery

The range in figures

How to choose

The auxiliary battery is specific to each model: check the original reference before replacing it, because dimensions and terminal type vary greatly between manufacturers and there is no standard format.

Naming and equivalences

Dynamic AUX is the new designation of the VARTA Dynamic SLI Aux. It is not a starting battery: it is the auxiliary battery that stabilizes the on-board network in vehicles with start-stop.

Frequently asked questions