The Lithium from Element Discs has been PDGA approved as of June 30th, 2016. Here is what Element Discs has to say about their first mid-range disc.
“Element Discs has entered the mid-range game with their new offering, the Lithium. This stable mid-range disc offers a shallow rim and flat flight plate. The unique convex rim feels perfect in the hand while creating a “quick release“ effect when sending the disc into flight.
Advanced players will enjoy the versatility of the Lithium. The Lithium is a very workable disc, providing players with surprising distance and a light fade upon approach. This disc responds to turnover shots as well, holding a predictable line before releasing its light fade. Players with slower arms will find the Lithium easy to throw with its straight flight. Hyzer, straight, anhyzer, and sneaky roller distance. The Lithium is a very versatile disc in any throwers bag. Flight Numbers: 5,4,-2,1″