Can a Dash Cam Continue Recording After the Vehicle is Turned Off?
3 Answers
If the dash cam is equipped with a parking monitoring function, it can continue recording after the vehicle is turned off, but the recording time is limited. Since the dash cam's power is supplied by the vehicle, it can only operate when the engine is running. Some dash cams have built-in batteries, but the capacity is too small to support prolonged operation. Connecting the dash cam directly to the car battery for extended periods can lead to excessive battery discharge, negatively impacting the battery's lifespan. Functions and Categories of Dash Cams: Function: A dash cam is a device that records video, audio, and other relevant information during vehicle operation. Once installed, it captures the entire driving process, providing crucial evidence in case of traffic accidents. Categories: Parking monitoring functions in dash cams are divided into two types: continuous recording or short-term recording triggered only when the vehicle detects vibrations. However, there are currently no dash cams capable of continuous long-term recording after the vehicle is turned off. Solutions for Parking Monitoring Power Supply: To enable parking monitoring, the dash cam must either have an internal rechargeable battery or be connected to the ACC fuse for power. After the vehicle is turned off, it automatically enters parking surveillance mode, where sensors continuously monitor the vehicle's status. If any abnormal activity or vibration is detected, the dash cam automatically records and stores the footage separately. Compared to a constant power connection, dash cams with parking monitoring connected to the ACC fuse consume less power and reduce battery drain. However, if the vehicle remains unused for several days, the battery may still deplete, making it difficult to start the engine. Another method is to use a power bank to supply electricity for parking monitoring. However, this approach has its drawbacks, primarily concerning the quality of the power bank. In high-temperature conditions, the power bank may overheat or even explode, potentially causing more significant damage.
Whether a dash cam can record after the vehicle is turned off mainly depends on its power supply method. The one I installed is directly connected to the car battery, equipped with a voltage reduction cable, so it can work even when the car is parked. Last time my car was parked in the neighborhood, another car's door hit mine, and thankfully the parking surveillance automatically started recording. It's important to pay attention to the battery power protection function to avoid draining the battery. My dash cam is set to automatically shut down when the voltage drops below 11.8 volts. When I don't use the car for a while, I turn off the parking surveillance in the app, and turn it back on before long trips. This way, it's both safe and worry-free. I highly recommend installing a model with low-voltage protection and hardwiring.
Actually, there are two key points to consider when parking: power source and function settings. I use a dashcam with an OBD interface that draws power from the battery and continues to operate after the engine is turned off. It has a built-in G-sensor that wakes up and starts recording when the vehicle shakes. Through the mobile app, I can adjust the sensitivity to prevent false recordings of minor events like falling leaves. Voltage protection is essential; I set a cutoff value of 12 volts to avoid draining the battery. I also store videos in cloud storage to prevent data loss. When connecting the step-down cable, it's crucial to follow the manual's instructions for wiring sequence; incorrect connections may blow a fuse. After installation, test the power consumption when stationary; the standby current should be around 0.08 amps to be reasonable.
