Ritchey di2 seatpost battery mount black
Securely hide your di2 battery within your seatpost with the ritchey di2 seatpost battery mount with this you can nearly find shimanos internal di2 batteryhttpwwwevanscyclescomproductsshimanodi2 internal battery ec053785 with your ritchey seatpost keeping it out of the way and away from the mud and rain