Re: do klingons use universal translators?
Regarding power drain, the Probe didn't drain power from humans. So simply use a UT powered by the same sort of processes that run within the human body.
That's a classic and pretty idiotic scifi cliche, really - that technology stops working, but somehow humans don't stop working. Let's face it: we are technology, too. We run on the very same processes that fire up our mobile phones or automobiles or submachine guns. If the alien entity of the week
EMP weapons destroy electronics, yet don't harm people. There's plenty of technology that can "jam" or "wipe out" technology but not harm humans.
Just because it's futuristic doesn't mean it's practical.