![Shimano Short Battery Mount External/Internal Wiring](http://velomine.com/cdn/shop/products/CY6743.jpg?v=1689181625&width=1445)
![Shimano Short Battery Mount External/Internal Wiring](http://velomine.com/cdn/shop/products/CY6743-01.jpg?v=1689181625&width=1445)
Shimano Di2 External Battery Mounts
- All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions
- Use Di2 system checker to update component firmware from http://e-tubeproject.shimano.com/
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