Supercapacitors can provide power for standby power after the car is started. For example, when the vehicle is turned off but the owner is still using the navigation system or sound system, supercapacitors can provide short-term power support even when the main power is turned off.

Secondly, supercapacitors can provide support for the instantaneous power of the audio system. The audio system of high-end cars typically requires a large amount of instantaneous current to drive high-power speakers. Supercapacitors can provide instantaneous power when the audio system requires high power.