Is that you in the profile pic?
anywho very extensive detailed classic review, beautifully done!
Does the light have reverse polarity protection?
For the best quality review one would want to see several similar lights in the same diagrams (runtime graphs) including the most popular, best-selling, or best performing models like Fenis Armitac Zebralite and maybe also Olite. They have set the standard and Cyansky is just copying, at a lower price.
Personally i wouldn't like the USB charging port (i prefer magnetic charging ports), and that alone would be reason enough for me to pass on this model. Fair enough.