Can a Dash Cam Be Powered by a Power Bank?
2 Answers
As long as the dash cam and the power bank have the same voltage, the dash cam can be powered by the power bank. Currently, most dash cams available on the market have an input voltage of 5 volts. The power cable of the dash cam has a voltage reduction function, which can meet the 5V voltage requirement of the dash cam. Wiring method for powering a dash cam with a power bank: A dash cam has three power wires: the ACC positive wire, the B+ constant positive wire, and the GND negative wire. During normal dash cam operation, connect the positive terminal of the power bank to the ACC positive wire and the negative terminal to the GND negative wire. For parking surveillance, keep the ACC wire connected to the positive terminal and the GND connected to the negative terminal, then connect the B+ wire to the power positive terminal. A switch or quick connector can be added to the B+ wire for easy switching. Precautions for using a power bank to charge a dash cam: First, choose a reliable, non-flammable, and explosion-proof power bank for powering the dash cam. It must be of high quality and have good safety features. Second, place the power bank in a safe location inside the car. It is best to use an explosion-proof bag or a sealed metal box to isolate the battery from external air, ensuring that any internal combustion will quickly extinguish due to lack of oxygen. Then, find a location for the power bank that is shaded, free of flammable materials, concealed, and convenient for wiring. The trunk and the glove compartment in front of the passenger seat, which are not exposed to direct sunlight, are good choices, especially the glove compartment for easy wiring. However, when purchasing a power bank, consider the size of the glove compartment. No matter how good the power bank is, always take strict protective measures when placing it inside the car.
A power bank can definitely power a dash cam, and I know from experience that it's quite reliable. Most dash cams operate via a USB interface with a standard voltage of 5 volts, which matches the output of power banks. The key is ensuring current compatibility; for example, my old dash cam required 1 amp of current, and when I used a cheap power bank that only output 0.5A, it automatically shut down. I keep a 10,000mAh power bank in my car and have tested it for several hours of recording without issues—especially handy when the cigarette lighter malfunctions or for temporary parking surveillance. However, it's important to choose a reliable brand of power bank to avoid the risk of overheating from low-quality products. Also, make sure the USB cable is securely plugged into the dash cam to prevent loose connections from affecting recording. Overall, it's a good emergency option, but for long-term use, the original manufacturer's solution is more stable.
