Battery-powered dash cams: Some dash cams have batteries and can easily be installed without wires, but the batteries won’t last long – typically around 30 minutes. Some dash cams can plug into a USB socket or 12V supply and keep running indefinitely, though the cables may look messy. A neater solution is to go for a hard-wired option…
Professional installation: The alternative to battery power is to get your dash cam installed professionally with hidden wiring. It will cost more, and you can’t move the camera from one vehicle to another, but it looks better.
Protection while parked: The advantage of a wired-in dash cam is that it can keep running while your car is parked, and record suspicious activity, attempted theft or parking bumps.