Hardwired radar detector draining battery

[MazdaTom]

Ever since I hard wired my radar detector, the battery will be dead if the car sits for more than 2 or 3 days. If I unplug the detector and the car sits for 2 or 3 days, there aren't any problems.

I'm not sure which fuse location I used, but it is switched. When the ignition is off, the radar detector is off.

Could it be possible to be getting some kind of low-level current draw that isn't enough to trigger the detector but enough to drain the battery?

[SATimko]

What did you tap the power lead into?