Specialized Roval Terra Seatpost Di2 Battery Holder Description: This Specialized Roval Terra Seatpost Di2 Battery Holder works to properly mount internal Shimano Di2 batteries within select Specialized bicycles and frames. Features: Genuine replacement Specialized parts Internal Shimano Di2 battery seatpost mounting kit Compatible with: 2021+ Specialized Diverge 2021+ Specialized S-Works Diverge 2022+ Specialized Diverge 9r 2022+ Specialized Crux 2027 Roval Terra Seatpost