In message , Michael Chare
writes
On 31/05/2018 09:16, Bill wrote:

Mine ran off a permanently powered cigar lighter socket, rather than
being fully plumbed in. The supplied 12v to 5v adapter went very
intermittent, so I replaced it with one that shows the 2 voltages and
current, as I had doubts about the cam internal battery.
I'm very enthusiastic about the 12v adapters with the current
display.

What exactly did you buy?

It was a

http://tinyurl.com/y79k9x4z

I have one in each vehicle. The display is above rather than between the
two usb sockets as shown in the picture on the site.
--
Bill