Well, I did something really stupid on the weekend.
I have some batteries I got with my little H8 that are the same size as the ones in this little machine.
The plug is slightly different but I was able to modify it to make it fit.
Unfortunately it also fit the wrong way and that is just what I did.

In too much of a hurry to get it flying, I did not bother to put my glasses on.
The props on the quad went immediately to full speed so I unplugged really quick.
Too late, that sickly, burning electronics smell came from the VTX on the camera.
I plugged it in the right way and it still works but as soon as you spin up the motors the video turns to absolute garbage.
I imagine the power filtering part of the VTX has been destroyed.
It was fun while it lasted, I just have to get another as soon as I can afford it.
On a plus side, the little quad still works perfectly and that really surprised me.