Can the Dash Cam Still Work When the Car is Turned Off?

[RowanRose]

When the vehicle is in the turned-off state, since the engine is not running, the vehicle's alternator also stops working. If the dash cam is turned on, it can only rely on the battery for power, thus consuming the battery's charge. Below is relevant information about car dash cams: 1. A dash cam is a device that records images, sounds, and other related information during vehicle travel. After installing a dash cam, it can record the entire driving process of the car, including video images and sound, providing evidence for traffic accidents. 2. Dash cams are mainly divided into two categories: portable dash cams and aftermarket in-dash DVD dash cams. Among them, portable dash cams are further divided into rearview mirror dash cams and data dash cams. These types of dash cams are characterized by good concealment, easy installation, detachable and replaceable features, low cost, and simple usage.

[OEmersyn]

I had the same question before. After researching, I found whether a dash cam works after the engine is off depends on its power connection. Like the one in my car connected to the cigarette lighter port, it turns off immediately when the engine stops because the lighter loses power. Later, I switched to a model with a built-in battery, which could last about an hour after turning off the engine, but the limited battery capacity didn't sustain long. After upgrading to a model with parking monitoring, it needed to be connected to the constant power section of the fuse box, allowing it to detect vibrations and automatically start recording even after the engine is off. However, be aware that this drains the battery quickly. Once, I forgot to turn it off after parking overnight, and the next day the battery was almost dead, making it hard to start the car. Now, I've added a voltage protection module for peace of mind. I recommend everyone to regularly check the battery status to avoid trouble.

[DiHolden]

As a tech enthusiast, I've looked into this in detail: The operation of a dashcam after the engine is off depends on its power supply mode. Those connected to the cigarette lighter power supply will turn off when the power is cut. Models with small batteries have a limited post-recording time but deplete quickly. Parking surveillance models must be hardwired to the vehicle's fuse box for constant current, such as the B+ line, to operate persistently. The key is power consumption control to prevent battery drain; options include products with automatic voltage monitoring that shut down below safe levels. Installation is recommended to be done by a technician to correctly wire it and avoid short circuits that could damage the electrical system.

[LaMiguel]

From a safety perspective, I must remind you: allowing the dashcam to operate while the engine is off requires careful handling. The default setting disables automatic shutdown when powered by the cigarette lighter source. To use parking monitoring, you need to connect to the constant power supply, but this consumes significant electricity and may easily drain the battery, making it difficult to start the car. I've seen a neighbor call for a tow truck due to this issue, which wasted time and effort. It's recommended to only set the vibration-triggered mode instead of continuous operation to reduce risks, and regularly check if the battery capacity matches the device's power consumption level.