Power Magic PRO is used with the Blackvue to hardwire.
Blackvue season 2 has done a much better job with resolving some issues. eBay has a few deals where you can purchase the Blackvue 400ii w/ power magic pro with the products warranties. Even 2 blackvues and the Pmp if you want to run a front a rear camera.
For the overall price the Blackvue is a decent option as long as the product backed by the seller. Some still reported overheating. How sure can anyone be that they are talking about the correct version.
Other forums actually have a vendor who did huge group buys on this cam.