The 12V outlet in my Mazda3 is "hot" even when the car is off. The USB ports next to it only have juice when the car is on. Is there an existing device or can something be built that would deactivate the 12V outlet when the USB port no longer has power? I'm imagining a male-to-female 12V plug with a USB port on it.
Thank you
Ari
Thank you
Ari