If the battery pack is a dedicated dashcam battery designed for dashcam use, then you will be able to use all functions of the Vueroid S1 4K, including parking mode, with the setup you described.
The automatic switching between driving mode and parking mode is triggered by the ignition-off signal, so the battery pack must be able to generate this trigger signal. This is why a general-purpose battery pack will not work — you need a battery pack specifically made for dashcams.
When the ignition is turned off, power from the cigarette lighter socket is cut, and the battery pack detects that the ignition has been turned off. It then sends the trigger signal to the dashcam. The dashcam switches to parking mode, and the internal cells of the battery pack will continue to supply power to the dashcam.
Instead of connecting the Vueroid S1 4K’s included H/W cable (3-line cable) to the vehicle’s fuse box, you can connect it directly to the battery pack.
If you contact us through the Support page on the Vueroid website and share a photo of the battery pack’s terminals, we can guide you more precisely on how to connect it.
Of course, for Ben from Safe Drive Solutions, this will be a piece of cake. 😉
By the way, what does that mean, "the purpose of transferring to another vehicle"?