Hey, there's no such things as Battery Detector!
Even its there, it ill never work!
Have all of you here ever seen the CMOS battery? Its just a goddamn thin button battery.
I dont have laptop in my car, but for sure they can detect the battery in my headunit remote control, or smart tag, or handheld GPS, heck I have 12V car battery upfront...show me any device that can 'detect' it....
The first picture is just a spectrum analyzer...I use it everytime to check signal wave (impedance checker).
The second picture is radar jammer...for jamming current speed camera which use laser..
Old radar detector can't detect laser, because it's so fast and its not spreading...thus using laser jammer...