Cigarette Lighter and USB Adapters

[Huw Powell]

On 12/18/2011 7:57 PM, Marc Boucher wrote:
> I ended up getting a neat little car USB adapter that was highly rated
> on Amazon. Manufacturer designs it to essentially be almost flush so
> that it becomes a permanent part of the car, given that cigarette
> lighters aren't much used anymore.
>
> Took some measurements of the USB adapter to see how much current it
> draws with nothing attached to it. It draws 26mA. Not a whopping amount,
> but its also not zero. And the cigarette lighter on the Audi in question
> does in fact stay on all the time....
>
> Finally, it was the rear-window child lockout that was stopping the rear
> lighter from working. I'd forgotten about that.

So... plug the USB into the rear lighter and use the child safety switch 
to turn it on and off?