Use if standard mount is not compatible with your bike and you are having problems making the Di2 battery fit try the battery mount adapter.
Best Price: £9.98 from Cyclestore
Shimano Sm-ba01 7970 Dura-ace Di2 Battery Mount Adapter Reviews
Use if standard mount is not compatible with your bike and you are having problems making the Di2 battery fit try the battery mount adapter.
Best Price: £9.98 from Cyclestore