If you intend on using Parking Mode on your camera, then we would instead recommend using a Hard Wire Kit, not the Cigarette Lighter Cable. The Hard Wire Kit will allow the camera to draw nominal current from the car's battery, preventing the cam's battery from being drained. The Hard Wire Kit has an in-built voltage cut off which protects the car's battery from being drained below 11.2V. We'd recommend using a Permanent Live fuse with Parking Mode enabled.