These batteries look pretty and to an uninitiated person they look perfectly legit. The problem is that battery reviews mainly only tell you how the output performs. It doesn’t really give you good information about the internal construction of the battery. Batteries with internal Panasonic/Sanyo for example have had millions of research dollars poured into making the batteries reliable and safe. With these things, who even knows what is really inside.
The last thing you want is a cheap battery that might spontaneously have an internal short.