Yes, Some battery packs do support parking mode, but our hardwire kit is still needed in this case, you need to select the spliced output cable in order to connect our hardwire kit to your battery pack.
Here is one battery pack we recommend.
Here is an introduction video FYI.
In case you are interested, we are also coming out of our own battery pack in the near future, i
In case you want/need to test parking mode at home, you can use our original car charge cable or the short data cable and wait for 5 minutes quietly as per the below video.
Note: It is not a routine operation to use the car charger cable for parking mode, as the camera may switch back to normal mode unexpectedly, or only switch back to the regular mode when your car speed is over 8km/H (GPS detect speed), which is not as reliable and convenient as using hardwire kit.