The new product line from BlackVue 750X series has an integrated battery monitor for recording in parking mode. I installed 750X-2CH-32GB in my MX-5 RF under the rearview mirror.

The rear camera attached to the wind blocker.

This camera set comes with a new power cable, with 3 wires to connect to battery power, ACC power, and ground. Unfortunately, the new power connector is not compatible with the previous 750S series. I modified supplied cable to connect it with a rearview mirror harness.

In parking mode, the camera can record in time-lapse mode or activated by an accelerometer. With a setting of the battery limit of 12.5V, I had 2-3 hours of time-lapse recordings.

I have a 32GB SD card option, with the highest quality settings it is enough for two hours of recording.

https://videopress.com/v/G6NvBtAb?muted=true&persistVolume=false&preloadContent=metadata