Dashcam Capacitors: How They Work and What to Compare

A supercapacitor is well suited to short backup duties and is common in cameras designed for wide cabin temperatures. It does not provide long standalone runtime.

Only with an external parking-power setup supported by the camera. The capacitor alone is not the continuous power source.

Usually only long enough for controlled file saving and shutdown. Manufacturers may not publish a precise duration because it is not normal recording runtime.

It may be a service component rather than user-replaceable. Contact the manufacturer and do not open the unit unless its instructions explicitly permit it.