BGG,
I was being facetious, with a dash of irony. Or steel casing in this instance. Boeing is casing its B787 batteries in steel because they have a habit of catching fire. The grounding of the B787 has cost them a few quid.
I was astonished by the lack of equipment in the RAF AWACS. Still, that was late 1999. I am sure they have rectified the problem?