Di2 Battery
Shimano Di2 BT-DN300 Internal Battery
The slim internal battery that powers every 12-speed Shimano Di2 groupset, from Dura-Ace R9200 to GRX RX825. It hides inside the seatpost or frame and charges through the rear derailleur.
Highlights
Why we rate it
Fits every 12-speed Di2 group
Works with Dura-Ace R9200, Ultegra R8100, 105 Di2 R7100 and GRX RX825 Di2, so one spare covers the whole range of semi-wireless bikes.
Three SD300 ports
Direct connections for the front and rear derailleurs, with a third port free for a wired shifter set-up or diagnostics.
Hidden away
At 17mm across it slips inside a seatpost or frame tube and uses the same fixing method as the older BT-DN110.
Long range per charge
Typical riding gives roughly 1000km between charges, depending on how much you shift and the temperature.
No removal for charging
Top it up with the EW-EC300 USB cable plugged into the rear derailleur port, so the battery stays put.
Tech specs
Specification
Manufacturer specification. Details may change without notice.
Specification
- Model code
- BT-DN300
- Type
- Built-in (internal) Di2 battery
- Chemistry
- Lithium-ion
- Nominal voltage
- 7.4V
- Nominal capacity
- 500mAh (3.7Wh)
- E-Tube ports
- 3 (EW-SD300)
- Diameter
- 17mm
- Length
- 152mm
- Weight
- Approx. 52g
- Charging
- EW-EC300 cable via rear derailleur port
- Compatibility
- Dura-Ace R9200, Ultegra R8100, 105 Di2 R7100, GRX RX825 Di2 (12-speed Di2)
- Operating temperature
- -10 to 50C discharging; 0 to 45C charging
In the box
- Includes
- BT-DN300 battery
Ordering
Available from The Cycle Collective
Available to order through The Cycle Collective in Dorking. For availability, setup or advice, call 0203 148 6764 or email hello@thecyclecollective.cc.
Product Information
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Wash at max 30°C
Hand washing with cold water (or gentle wash cycle)Using mild, high quality detergent
Drip drying in shade, do not machine dry
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Sorting your clothing by color
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Storage
Unused sealed sachets should be stored inside the box in a well-ventilated, dry place and protected from moisture, heat and direct sunlight. Can be stored for up to 3 years.
Size
Each sachet contains 30g powder.2 x 30g sachets per carton box.
Makes 2x litres of bike cleaner
100% plastic free packaging
Readily biodegradable ingredients
100% water free
Refill your old bottle and help reduce plastic waste
92% saving in packaging compared to 2 x 1L bike cleaner
100% environmentally friendly ingredients, including plant based raw materials
Supplied in a compostable sachet and printed with vegetable inks
FSC recycled card box containing 2 x sachets – that makes 2L of bike cleaner
Safe on all parts and surfaces including carbon fibre
Will not harm seals, cables, disc brake pads or rotors
Alkaline based and free from alcohol, CFCs, EDTA, solvents or acids
Vegan & vegetarian friendlyCruelty free, not tested on animals
Sachet Instructions
1. Grab your empty old bottle of Muc-Off. (You may need a pair of adjustable pliers to remove the trigger from the bottle). Or purchase our Bottle for Life.
2. Fill up to the shoulders of the bottle with 1 litre of lukewarm water for faster formula activation!
3. Carefully cut one corner of the sachet open along the diagonal cut lines.
4. You can carefully pour the sachet straight into the top of the bottle. Or using the box, fold the inside of the lid together using the printed lines as a guide and use this as a funnel to pour the powder into your bottle. (Please see our video for full instructions on this.
5. Screw your spray trigger back onto the top of the bottle. Ensure it’s tight!
6. Shake the bottle vigorously for 30-60 seconds to activate the formula. If you notice any undissolved powder simply keep shakin’ it!
7. Go clean that filthy bike!
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