We can upgrade your Dura Ace Di2 frame by putting your battery inside the seatpost. We are the local agent for the Calfee designed product. These batteries are not only lighter and smaller than the orignal item but they also last longer. To recharge you just remove your seatpost and plug the battery in. Pricing starts from about $350 if you send us your seat post and harness or $400 fully installed.
Technical and Performance Features;
- 8% lighter than Shimano components
- 2 to 3 times longer lasting than Shimano components; between 2500 and 10k miles per charge
- Battery specification; 7.4v, 650mAh, Lithium-ion
- Compatible with Shimano’s inline battery life indicator
- Eliminates needs for cable guides or stops, cable ties, adhesives and external mounts
- Calfee Di2 Internal Battery and Wiring System includes; installation of sleeve in seatpost, battery, charger and modification of internal wiring harness (EW-7975)
- Calfee Di2 Internal Battery and Wiring System replaces the following Shimano components; battery, charger and charger cable.
On the left is the Calfee battey installed in a conventional seat post, super cool!
On the right is the battery installed in a Wilier Centro 1 with an intergrated seatmast. We have not found a frame as yet we cannot install one of these batteries into.
You can see here the battery and the external cable running up the down tube, how much better and cleaner does it look on the right. Note the cable guides have been removed the holes repaired and paint made like new again.
Again looks so clean, the cable entry into the frame looks like it was always ment to be there, that is what we can do make you frame look like it left the factory with intergrated Di2.
