Giant ISP/Vector/D-Fuse Seatpost Di2 Internal Battery Holder

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This product was added to our catalog on December 2, 2015.

This is the Giant Internal Battery Mount for Di2 Seatpost mounting batteries in aero seatposts such as ISP, Vector, and D-Fuse models. The holder is inserted into post beside the battery and a compression screw expands the holder to secure the battery in position.


  • 08-15 TCR Adv SL ISP (Vector shape)
  • 12-14 Defy Adv SL ISP (Vector shape)
  • Vector seatposts
  • 15+ Defy Adv SL ISP (D-Fuse shape)
  • D-Fuse seatposts
  • 14+ Propel Adv SL ISP

Does not Fit: (Use this model)
  • 16+ TCR Adv SL ISP (Variant shape)
  • 16+ Variant seatposts