Here's a proof that even electronically educated people can be ripped off by chinese 
Martin, buddy, step into our office :D
Is that a Cree XR-E? Why???
It looks like the thermal path is very poor.
Battery life is again debatable. It depends how they test it. It may indeed last 13 hours until the light flickers out, and that's probably the way it's measured if it's measured at all.
I stopped watching after 8 minutes.
I watched the whole video. 
It’s basic stuff but made me wish I had an electronics teacher like that at school…
Hi is a nice guy, knows a lot of thing about electronic but he obviously doesn’t know much about driving LED emitters 