The Di2 SM-BMR2 Battery Mount secures the SM-BTR2 battery to your frame.
This integral components is available in two lengths, Long and Short. The Long version is compatible with most bikes, it's designed to attach to the seat tube or down tube via a single water bottle boss. The Long mount comes in internal or external variations depending on which cable routing your bike uses.
This product is also back compatible with Ultegra 6770 Di2 but requires component firmware updates. You will need the SM-PCE1 PC Tool to install these updates, which can be downloaded at http://e-tubeproject.shimano.com
. Alternatively, the most recent firmware can be installed at your local Shimano Service Center.
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