This is a copy sent to BlackVue UK:- Purchased a Power Magic Pro for my BlackVue550GW front and rear cameras after the previous older type of parking mode unit failed me (totally dead). The new Power Magic Pro does not work properly either. I used to work for an electrical supply company so I DO know what I am doing. I am using 2 suitable fuse connections on my late 17 Mini (+ACC) and (+BATT). Checked them with a multi-tester and checked after leaving and locking the car for an hour connected to the tester. The +BATT has a constant supply. However when I connect the Power Magic Pro, it turns off the cameras after ignition is switched off, in the ON position? I then check the connection again on the white pin connector, yellow (+BATT) there is still power? So why is the PM Pro switching off? Now the uncanny part of this is:- When I connect the PM Pro to a 12v model train transformer, the PM Pro works fine, and then I disconnect the red (+ACC) cable it still stays on, as it should do in the on position? Why it will not work on the car, is a mystery? Can you explain this. PLEASE? I have had 2 hit and run bangs on my car in 5 months and I am desperate to get the parking mode working on the cams. PLEASE HELP IF YOU CAN. In the meantime I will have to return the PM Pro for another replacement. Hours and hours of wasted time!