Drawing power from your car battery DIRECTLY with our hardwire kit is the best choice, as the camera switch between regular mode and parking mode automatically, and no concerns about battery drainages.
While if you must use an external battery as a power supply, you may read on.
1. Spliced output cable
Firstly, you still need to buy our hardwire kit, secondly, please make sure the battery pack comes with spliced output cable to connect to our hardwire kit.
Tips: Please check the spliced cable carefully and confirm which is for B+ and which is for ACC OUT. In some cases, you need to connect the red cable to the yellow ACC cable in our hardwire kit, as per the pic above.
2. Recommendation
Here is one battery pack we recommend.
Cellink NEO Battery — BlackboxMyCar
Here is an introduction video FYI.
In case you are interested, we are also coming out with our own battery pack in the near future.
3. Test parking mode temporarily?
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, which is not as reliable and convenient as using hardwire kit.