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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.
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.
| References | 3 |
|---|---|
| Capacity | 9 – 35 Ah |
| Cold cranking | 130 – 520 A (EN) |
| Voltage | 12 V |
| Technology | AGM, PLOMO/ACIDO |
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.
Dynamic AUX is the new designation of the VARTA Silver Dynamic Aux. It is not a starting battery: it is the auxiliary battery that stabilizes the on-board network in vehicles with start-stop.
It powers the vehicle's electronics when the engine is off and during the start itself. It prevents voltage drop from restarting the radio, the navigation system, or the driving assistance systems.
No. Its capacity and starting current are sized to power comfort electronics, not to move the starter motor.
The VARTA Dynamic AUX, with the same references.
By the original reference of the vehicle. There is no standard format: dimensions, capacity, and terminal type vary greatly between manufacturers and are not interchangeable.
