Thread:Tupka217/@comment-220364-20140222155331/@comment-220364-20140222160631

IIRC it was to avoid transitory or inconsistent powers - Batman, Flash, Superman, Luthor, etc have used power rings so...

If Category:Empowered by Equipment is sufficient to add power, skill, and weakness categories, then something, somewhere needs to point out that those temporary powers (Batman has a Sinestro Ring!) or inconsistent powers (the Black Lanterns rings in general) don't get added.