I think the patch Bernd posted that adds a quirk table to uhid so that
devices like these UPS units can not attach to uhid is a good one.
Right now the software out there that wants to talk to these devices
wants ugen, and it's easy enough to list the ids to get them handed to
ugen.

It would be even cooler to be able to force a detach from uhid and
reattach to ugen with a user-space control program.  But that's probably
much harder.