Comment by ksaj

Yes, they also use that sniffer wand over the keyboard. And some airports use dogs. Some rely on Xray and similar scans.

Not every airport does exactly the same thing. Some do multiple things. I don't think it was even implied that all airports are exactly the same. My point was about density of battery and explosive material, and not about these "other ways."

For that matter, the xrays and other visualization scans also show the density similarities between batteries and explosives. And that density was the entirety of my point.