In addition to the traction battery for the drive, electric cars (yes, including the Enyaq) also have a 12V on-board battery to power the central locking system, lights, radio, sat nav, etc. The 12V battery is also needed to start the car. The 12V battery is also needed to start the car. Here you can of course use the booster to start the car in the event of a discharge or failure. The booster is of course far too weak for the drive ;-)