Shed precious grams off your Di2 drivetrain with the Pinarello Seatpost Internal Battery Mount. This slick internal battery mount lowers the weight of your groupset below that of the 9000 mechanical group, helping to maximize efficiency on your race bred Pinarello. Designed specifically for Pinarello's Dogma 60. 1, Dogma 2, and Dogma 65. 1 seatposts, the Seatpost Internal Battery Mount for Di2 neatly tucks away the Dura Ace 9070 SM BTR2 Internal Battery sold separately for added protection from the elements.