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A comment on FAA Bans Recalled Apple Laptops from Flights. Parent comment

Re:FAA Bans Recalled Apple Laptops from Flights by Reason077 on Wednesday August 14, 2019 @08:05AM (#20694604)
Wouldn’t plastic explosive have a different density to real batteries, and thus show up very obviously on the scanner?

The machines are tuned to highlight specific risky materials (such as liquids & gels).

At one point it was common to be asked to turn on laptops etc. But I haven’t seen them do that for years - presumably because the scanners have improved.

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Re:FAA Bans Recalled Apple Laptops from Flights by pbhjpbhj on Wednesday August 14, 2019 @03:17PM (#20698953)
LiPo laptop battery is apparently around 1.8-2 g/cm3 (sorry can't find good figures), whilst C4 is 1.73 g/cm3. Not sure what the density resolution is like -- I'd guess it's poor because you can't tell what thickness/type of casing you're looking through from the luggage "xray"; I'd imagine it to be primarily good at relative density.
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