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Item # SHI00CM

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Item # SHI00CM

Power up.

Refresh your Di2 shifting system with the Shimano BT-DN110 Di2 Battery. Designed to fit stealthily in seat posts and other internal mounts, this battery is compatible with Shimano's E-Tube technology to drive precise shifts no matter the conditions.

  • Internally-mounting Di2 battery
  • Compatible with E-Tube technology

Tech Specs

Shimano Di2
Actual Weight:
One Color, One Size: 51g
Recommended Use:
cycling, mountain bike
Manufacturer Warranty:
2 years

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  • Familiarity: I've put it through the wringer

Have had multiple Di2 bikes and the new internal battery has been flawless. No issues to report and easy to use and install. My only minor issue I raise would be an internal mechanism that would a universal support/attach and dampen the unit in the frame. A good shop mechanic can work around this though.

Invisible Power!

  • Familiarity: I've used it once or twice and have initial impressions

Just had this battery installed on my bike, and I love that it is tucked neatly into the seat post! From everything I've read and word of mouth from other users this thing is rad!!! Long and reliable battery life. Can't wait to put it through its paces!

Robot Bike

  • Familiarity: I've put it through the wringer

Whiiiiiiir Zip Beep Boop Beep

It occurred to me how crazy Di2 is, as I was running a firmware update on my bicycle. When Skynet takes over we Electronic Shifting cyclists are in trouble.

All Jokes aside though. 1600 miles on this drivetrain and not a single issue or adjustment needed. Every shift has been flawless, and barring any unforseen circumstances, like a crash or some good old fashioned garage or transportation mishap, I fully expect go 6000+ miles with no issues. The only drawback I can find, and this is totally a personal preference, but I sort of miss the mechanical drivetrain for no reason other than the simplicity of pushing a lever which pulls a cable which moves a derailleur. I would argue that the Di2 lacks tactile feedback when shifting, but that is just me nitpicking. I rode the battery until it completely died just to see what would happen. At about 1300 miles (this includes plenty of playing with the new group, shifting just to hear the sounds and show off the auto trim) The battery died on my 18 mile commute to work one morning, first the front derailleur refused to shift, after a few more shift button clicks it did shift down into the small ring, and I had about 30+ shifts of the rear derailleur before the system became unresponsive. So 1300 miles, I think it is safe to say a rider would need to be quite negligent to run out of power on accident.

Unanswered Question

How does this battery compare with the previous version of the internal Di2 battery (i.e., the SM-BTR2)? Specifically: 1) is it electronically compatible with the Shimano 9070 groupset; and 2) does it have the same external dimensions such that it is compatible with a seat post battery holder that already works with the SM-BTR2?