Ding ding ding, we have a winner
PC USB ports were originally spec'ed to 5 vdc and the industry grew from it. If a device can power off of a USB port it'll work in an old antique 6v auto system, negative ground that is
Dave
I might be wrong, but I am pretty sure that the USB specification requires 5.0 +- maybe 0.5 VDC output. So cigarette lighter to USB converters should all work even at 6V.
Bob
