The anker works but is not solid. It uses frames that are not that tight of fitting. It is a generic battery case that is apple certified. I don't have that tylt case but judging from tylt products that I have, it will hopefully work great for you.
http://www.amazon.com/Certified-Rub...iewpoints=0&sortBy=bySubmissionDateDescending
Look, it appears they just came out with a new version of the case that has a new frame and not the flimsy kind.
As an Amazon Associate, MacRumors earns a commission from qualifying purchases made through links in this post.