Given the shortcomings of low power battery testers/meters for checking
certain components that typically run at considerably higher working
voltages where any fault may only become apparent, has anyone any
thoughts on the utility, or otherwise, of these devices?

http://www.ebay.co.uk/itm/Transistor...onent-Tracker-
Tester-Probes-BNC-Cables-/161294643173?
hash=item258de8efe5:m:miccP4BhvzYiDpcErFn7FDw