What do you think about using the source in the video below and a buck-booster for a constant 12v? I was going to attempt it this weekend for my blackvue





With your locations, do you believe this might apply as well (from the video):



Note: I have not tested this long-term, but my guess is that the car won't be "surprised" by a power draw connecting to either of these locations since they are downstream from the power distribution system. Bypassing the power distribution system by connecting directly to the 12V battery has given some people errors (from what I've read on forums) since the car detects any voltage drop at the battery (other than it's own usage) as a problem with the battery.