This can get into a long and confusing discussion.
Probably the theme might better be ‘friends don’t let friends buy an IMAX B6’. If you have to ask about buying an IMAX B6, you probably shouldn’t.
The clone wars have spawned a bunch of chargers from highly suspicious to pretty damn good. Folks seem to think if they look the same they will function the same. There are a good number of components and a lot of soldering on those boards. There ends up being some real variations in component quality and soldering expertise, just like lights but even more so.