Would any of those devices be marked as Class III?
But it's an interesting area this, so let's discuss it further. I would split stuff like that mentioned into three types straight away:-
1) The AED defibs (what are they marked as? Class II, I suspect)
2) Small battery powered devices (such as TENS) ... that have
no mains chargers or "adaptors"
3) Pacemakers (external, presumably) ... a special case, IMHO
What does "electrical safety" say about each type? For a start the defib is
meant to deliver an "electrical shock", is it not (but hopefully only to the patient)?
And ... how can a TENS unit, nerve stimulator
et al powered by 9 VDC PP-3 battery muster up enough Joules to really hurt anybody? "Startle", perhaps!
In my experience, "minor" devices like this often crop up. In fact they are everywhere, and many are privately owned (
eg, TENS). So this is an issue worthy of discussion ... please discuss.
Other than that, I stand by the simple rule that everything with a mains plug gets "Tested and Tagged" (tested for electrical safety, that is), whilst (small) battery powered devices don't (getting just a functional test instead). Or, put another way, how can you
Rigel* a TENS unit?
*
Other manufacturers of fine medical electrical safety testers are available.
