Hardwired my Thinkware Q800pro dashcam over the weekend, using the "mirror tap" method detailed in this post:
https://g20.bimmerpost.com/forums/sh...3#post25390353
Like the BlackVue 650s, the Q800pro has a parking mode, which relies on being hardwired to an unswitched 12V circuit (in addition to the switched 12V input wire and ground wire). So in addition to tapping the mirror wiring as detailed, I also tapped the pink/green wire on the red connector as the unswitched "battery" lead. So far this setup is working perfectly. The unit stays in normal operating mode for 5-10 minutes after the car is turned off, then goes into to parking mode once the switched 12V input powers down.
After reading this and other threads on the topic, I expected to encounter issues where parking mode shuts down after a very short period due to voltage drop, and/or the car complains about the battery voltage dropping too low. So far, I have experienced neither. I have the battery protection level on the Q800 set as high as it will go (which is only 12.3V). The cam has run all night two nights in a row, recording motion events overnight and all the way up until I've started the car the next morning. The cam hasn't shut off at all apparently, which I assume means the battery hasn't dropped below 12.3V at any point. I'm not sure what the warning threshold is, but the car hasn't complained at all about the battery level yet, so I'm taking that as a win.