Over the years I had two of
these and two of
these. They all died of a horrible death within 2yrs. One actually blew and disjuncted my house. And they weren't cheap at $170.00 a pop at the time.
Then I had enough so I now use this
one and one of
these. I haven't had any issues to date. I also use a step up
DC to DC converter from Jaycar too, to get 16V for the Gemini out of a 12V supply.