I finally got around to installing mine. simple installation .. just crimped spade connectors, and attached to the 12v accessory socket on the scrambler. I tested the socket (not the USB), and it was reading around 13v, which I assume is pretty normal (bike was off, it's a permanantly powered socket).
I then plugged in a short iPhone lead that I use with my laptop, and got the dreaded charging not supported
message. It shows the plug icon on the phone, but not the charge icon.
Any suggestions ?