Constant power cigarette lighter

Found out the cigarette lighter is connected to a hot circuit, so it is always powered. I wish I could plug in my radar detector, and leave it plugged in. This is the first car I have had that has the outlet not connected to a switched power supply. Anyone think it would be possible to swap it to a switched power source?
Well I guess I am alone on this issue. The USB under the climate controls goes right off when the iPhone is connected. Oddly, now that I have an adapter to run the radar detector from that usb, it stays on for awhile after the car is turned off. Weird.
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