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Di2 Battery Holder for Round Seatposts | Shimano BT-DN300, 20-29mm Internal Diameter
Di2 Battery Holder for Round Seatposts | Shimano BT-DN300, 20-29mm Internal Diameter
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Secures internal Di2 batteries inside round seatposts | Flexible rubber, multiple damping rings | Two sizes: 20-23mm and 21-29mm Internal Diameter
This sleeve holds the Di2 battery firmly inside a round seatpost, cutting down on the movement that leads to rattling or a loose-feeling battery while riding.
It's made from flexible rubber and uses multiple damping ring structures to grip the inside of the post, and built-in positioning tabs (limit stop design) make it easier to install and remove.
Designed for batteries like the Shimano BT-DN300 and similar internal seatpost battery systems, and comes in two sizes to match your seatpost's inner diameter.
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Specifications
| Seatpost Inner Diameter | Length | Width | Battery Fit | Net Weight | Package Size |
|---|---|---|---|---|---|
| 20-23mm | 70mm | 28mm | ~14.6-17mm | ~11.3g | 17 x 10 x 3cm |
| 21-29mm | 70mm | 32.5mm | ~14.6-17mm | ~13.8g | 17 x 10 x 4cm |
Made of Rubber
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Notes
- Not recommended for non-round/irregular shaped seatposts
- Measure your round seatpost's inner diameter before purchase
- Designed for round seatposts only
- Make sure the battery and wiring have enough space inside the seatpost
- Do not force the installation if the sleeve is too tight or doesn't match your seatpost
- Manual measurements may have slight tolerance
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