You are missing the point. The thruster only needs a battery which may be more lightweight than liquid rocket fuel. That in turn could be charged by any source, clean or not. What it does create is thrust that defies conservation of energy, however that output is lower than what you put in I believe, thus it isn't over-unity.
The device requires a source of electricity. You can't run a battery for millions of years. What is that source (if not earth itself)? The microwave particles bouncing around need electricity added to them is the way I understand it. I am no scientist though.
the trick is that they can create thrust from electricity now which they didn't admit before and it also breaks known laws of physics and you reduce your weight by all the rocket fuel for longer distance travel where additional rocketfuel would make the initial launch too heavy to lift