It's also battery powered!
What intrigues me more here is where this is coming from. As in, who is telling you that the test you mention is needed? The "management" ... the manufacturer?
Is the requirement "evidence based" (have these things been known to "fail" on patient auxilliary current)?
Or, put another way, which way are we looking at things:-
1) If it ain't bloke, don't fix it.
... or:-
2) If it ain't bloke, you're not trying hard enough!
