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Shimano Di2 BT-DN110 Internal Battery Shimano Di2 BT-DN110 Internal Battery
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Di2 BT-DN110 Internal Battery

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  (7 customer reviews)
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Shimano's Di2 BT-DN110 Internal Battery is compatible with current and previous generation Di2 groupsets. Its new chip with larger memory will unlock Synchro Shift and Bluetooth setup through Shimano's wireless E-Tube Project app, and although it has the same capacity as the previous model, updated firmware means better battery life for your Di2 drivetrain.

B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.

Mfg PartNum: IBTDN110A7 

w/ Recycle Mark

Mfg PartNum: IBTDN110A1 

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1 stars
You NEED this!
by DLinLV
Competitive Racer
Las Vegas

Cant do synchro shift without this battery, and its worth the upgrade just to get synchro shift. I'm not a lazy shifter but it is convenient in a race to not have to think about the gearingcross chaining as you meet hills. Just shift!

Reviewed 5/12/2017
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Awesome Deal
by BikeJunky2
Competitive Racer
Wenatchee, WA
0 of 1 customers found this review helpful.

Great new features over previous model.

Reviewed 1/9/2017
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The Di2 BT-DN110 INTERNAL BATTERY didn't work as described by Shimano! WesternBikeWorks is a great place to buy (especially in a case like this)!
by Karl
Cycling Enthusiast
0 of 1 customers found this review helpful.

WesternBikeWorks is a great place to buy (especially in a case like this) and offered to allow me to return the Shimano products!

After talking with the Shimano USA Customer Support I was stoked to get a bike with Ultegra 6800 Di2 and upgrade it to get Synchro Shift. As required I ordered the BT-DN110 battery, EW-WU111 Wireless Transmitter, and an E-Tube Wire. After I set this up I discovered that the Synco Shift on the 6800 (or 9000) only allows down shifting the front derailleur after you reach either the innermost or second innermost sprocket on the cassette (I've been riding bikes with front rear derailleurs for over 40 years and as a rule try to avoid big ring - big sprocket combinations). I spoke to Shimano USA Customer Support team and they did not know about this undocumented limitation. After several interactions they were either unwilling or unable to work with Shimano to address this defect (which is likely a software coding mistake in the e-tube project app).

I'm terribly disappointed in Shimano USA. They don't stand behind their products or take the time to address a situation where they have under delivered product capabilities.

Reviewed 1/7/2018
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Powers the magical Di2
by Yelpspoon
Cycling Enthusiast
2 of 2 customers found this review helpful.

Does what it's supposed to...but the real joy of the new DN110 (vs BTN2) is the ability to allow the slimmer D-Fly replacement Di2 transmitter AND the ability to support syncroshift on Ultegra Di2 (as of 32017) with firmware upgrades (you are regularly upgrading your firmware, right?).

Reviewed 4/28/2017
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Works with the bluetooth well.
by ctqtip
Cycling Enthusiast
North Haven, CT

Got this to use bluetooth with the Di2 and it is good to go.

Reviewed 7/26/2018
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Its a battery and more
by Anonymous
Daily Commuter
2 of 3 customers found this review helpful.

I replaced my older BTN2. I was upgrading my derailer and I wanted the features on the e-tube app so figured now was the time. Straightforward unplug and plug. It is not clearly stated so I was confused if the new battery alone support blue tooth or I needed to add the EW-WU111. This is not the case. The BT-DN110 WILL pair with your phone and you can use the etube app. This DOES NOT require the EW-WU111.

Also, the new batteryderailer combo supports synchro shift which I unexpectedly like very much.

Reviewed 2/1/2018
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Di2 System Battery component
by John42
Cycling Enthusiast
Vancouver, WA

Shimano Di2 BT-DN110 Internal Battery, Tucked into the Seat Tube, you might forget about it with its long charge, battery life.

Reviewed 9/15/2020
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