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Ships within 48 hours · Estimated delivery Aug 13 - Aug 18
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Description
BT-DN300 Di2 BatteryThe new DN300 Built In type battery features the same waterproof design that Di2 users have loved for generations. Now with 3 ports, it delivers stable power to Shimano's 12 speed road derailleurs (and shifters if a fully wired option is selected). Compatible with thinner next generation electric wire SD300 and systems after R9250 R8150 series Li Ion type Capacity: 500 mAH 3. 7Wh ( 2000km autonomy) Rated voltage: 7. 4V Charges through RD R9250 RD
- The new DN300 Built-In type battery features the same waterproof design that Di2 users have loved for generations. Now with 3 ports, it delivers stable power to Shimano's 12-speed road derailleurs (and shifters if a fully wired option is selected).
- Compatible with thinner next generation electric wire SD300 and systems after R9250/R8150 series
- Li-Ion type
- Capacity: 500 mAH / 3.7Wh (± 2000km autonomy)
- Rated voltage: 7.4V
- Charges through RD-R9250 / RD-R8150 rear derailleur using EW-EC300 Di2 Charging Cable (sold separately)
- Fixing small parts included
- Weight: 52 g
Attributes
| Misc | Built-In Type, with BlueTooth connectivity |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 15 reviews
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Product Reviews
★★★★★ 4
Great watch while it works but durability is questionable.
Color: Green
Cute, fun watch that keeps good time but band fell off the first week I wore it. A kind passer-by returned it to me. I got the band back on and it's been fine since but would have lost if not for the passer-by.
Still, since it's an inexpensive watch, it's a good value for the price.
(Had a similar watch that I loved but it quit working in less than a year.)
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Reviewed in the United States on June 22, 2025
★★★★★ 2
Watch band
Color: Green
The watch looks great. Keeps n good time. However band is already breaking. I got this morning my elderly mom. Seriously sick of cheap products
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Reviewed in the United States on May 4, 2026
★★★★★ 3
Band will not hold up
Color: Blue
Watch is cute and works well, but the band did not last long ,ended up buying a leather band
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Reviewed in the United States on April 2, 2026
★★★★★ 5
great watch
Color: Purple
this is the cutest watch and keeps great time!!!. I love the face, it makes me smile every time I look at it. great value
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Reviewed in the United States on April 21, 2026
★★★★★ 1
Bad quality. Stopped working within a month.
Color: Blue
This watch stopped working the day after Amazon accepts returns. I had only worn it twice. I had another similar watch which worked fine. I don't see any warranties from the manufacturer for this item. So a waste of money. Also for the 30 day return - I received this on January 11, it is February 11 - I should be able to return for refund.
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Reviewed in the United States on February 11, 2026