In an earlier posts in this thread, I mentioned that my first two UT01s worked perfectly while a third does not. I have an update to that. I decided to keep the two ‘good’ ones for gifts, and struggle with the balky one myself.
Oddly enough, the more I used it, the better it worked. To begin with, it was reluctant to come on, reluctant to turn off or to change modes….it would ‘stick’ in low and need to have the tail cap loosened to regain any function. In one of its more co-operative moments, I did manage to run the programming cycle, which it remembered… (The driver board in this one is stuck tight, and I can neither budge it nor get the nose cap off; I’ve applied force to the point of fearing damage.)
After a couple of days of relentless and frustrated clicking it began working more and more consistently. Now, while still on its first lithium primary, it works as well as the other two. There remains a sense of something not being right in the switch - a feeling of two clicks ‘on the way down’ for lack of a better explanation - but it’s much better than before and it obeys all inputs without hesitation.
While I don’t doubt there might be a variety of problems with these lights, mine appears to have a mechanical issue in the switch which is somehow rectifying itself through repeated use. I’ll continue to use it. Mercilessly.