What are the power supply methods for car dash cams?
2 Answers
There are several power supply methods for car dash cams as follows: 1. USB port power supply: ①Advantages: This method does not occupy resources and maintains aesthetic appeal. ②Disadvantages: The USB stops supplying power when the car is turned off, failing to meet the 24-hour operational requirement of dash cams. Additionally, the current peak during car startup may potentially damage the dash cam. 2. Cigarette lighter port power supply: ①Advantages: This method is energy-efficient and offers good stability. ②Disadvantages: It occupies the only stable power receiving port in the vehicle, and the exposed wires may affect aesthetics. 3. Reading light power supply: ①Advantages: Provides relatively stable voltage and is safe and reliable. ②Disadvantages: Incorrect modifications may easily cause electrical short circuits. 4. Fuse box power supply: ①Advantages: Offers relatively stable power and has a certain level of interface universality. ②Disadvantages: For car owners unfamiliar with automotive circuits, it can be difficult to determine which interface can supply power. Additionally, it requires purchasing a step-down cable compatible with the original dash cam power interface or a fuse box power adapter with matching fuse specifications.
I installed the dash cam by directly tapping power from the fuse box, which is the most reliable method, but it requires a professional to do the wiring. They use a fuse tap to connect to an empty fuse slot and then hook up the voltage reducer. The advantage is completely hidden wiring, and the cigarette lighter port remains free for other uses. However, beginners shouldn’t tamper with the fuse box themselves, as it could easily short-circuit the system. Make sure the technician connects it to an ACC fuse, so the dash cam automatically powers off when the car is locked, preventing battery drain.
