
Dash cams can be used when the vehicle is parked, as long as the engine is not turned off and power is not cut. After parking and turning off the engine, the dash will automatically shut down and stop recording. Dash Cam: An instrument that records images, sounds, and related information during vehicle travel. After installing a dash cam, it can record the entire driving process in video and audio, providing evidence for traffic accidents. For those who enjoy road trips, it can also be used to document the journey through challenging terrains. While driving, it continuously records video, simultaneously capturing the time, speed, and location in the footage. It can also be used at home as a DV to record life's joyful moments or serve as a home surveillance device. Additionally, it can function as a parking monitor when installed. Built-in Battery Installation: Many dash cams come with built-in batteries, but the capacity of these batteries is usually very small. Dash cams without parking monitoring will automatically record when the vehicle is parked and turned off, but the recording duration is very brief. The purpose of the built-in battery is to provide power for the dash cam's startup and shutdown functions, primarily for emergency use.









My own car comes with a factory-installed dash , but whether it can be used while parked depends on the specific features. Some models come with built-in parking monitoring, but enabling it requires two conditions: first, it must be connected to a voltage reduction cable to prevent battery drain; second, the parking guard mode must be activated in the vehicle settings. Honestly, even if it's turned on, don't expect it to last too long. Last time I went on a five-day business trip, I found it had automatically shut off when I returned. If your car doesn't have this feature but you still want parking monitoring, you'll have to install an additional module with time-lapse recording. However, this thing really drains the battery, and older cars might not start the next day.

Many new cars do advertise parking surveillance, but I recommend using it cautiously. Continuous monitoring drains the significantly, especially for vehicles with auto start-stop systems. Last week, my neighbor's battery was completely depleted by the dashcam, costing 200 yuan for emergency jump-start service. If you really need parking surveillance, make sure your vehicle has low-voltage protection—meaning it automatically cuts off power when the battery voltage drops below 11.8V. Another tip: Lower the sensitivity so it only records during severe vibrations, which saves considerable power. It's more reliable to activate this feature only when parking overnight in unfamiliar locations.

From a technical perspective, the original car dashcam offers three parking modes. The collision-triggered mode is the most power-efficient, utilizing built-in G-sensors to monitor vibrations. Time-lapse recording compresses one hour of footage into one minute. Continuous 24-hour recording consumes the most power. Most mainstream vehicles currently favor the first two modes—my car's manual states 'parking mode operates for up to 48 hours at maximum.' Key consideration lies in the fuse box wiring method: connecting to a constant power terminal enables uninterrupted supply, while linking to ACC cuts power after ignition off. For modifications, installing supercapacitors is recommended as they outperform lithium batteries in high-temperature resistance.

As an owner who has used three factory-installed dash cams, the actual performance of parking surveillance doesn't live up to the advertised . Once my car got scratched at midnight, but when I checked the footage, I found the camera had automatically turned off two hours after parking. Later, I learned from the 4S shop that the factory default setting shuts down when the battery drops below 70% to prevent starting issues. If you truly want 24/7 monitoring, it's better to spend 300 yuan on an external parking surveillance wiring harness with voltage detection. Remember not to operate continuously for more than three days in summer, as excessive battery temperature accelerates aging.

Veteran Driver's Advice: The parking surveillance of factory-installed dash cams depends on specific circumstances. Those powered via OBD ports last longer than cigarette lighter-powered ones, but drain is inevitable. I usually disable the function in monitored areas like banks and hospitals, only activating it when parked in urban villages. Important reminder for EV owners: Don't assume electric vehicles are immune to battery drain! A hybrid-driving friend forgot to turn off parking surveillance, resulting in a completely dead auxiliary battery after one week - replacement cost 1,600 yuan. New radar-triggered recording technology consumes 70% less power than vibration-triggered systems, though requires additional modules.


