Shimano Di2 battery charger — the wall-plug-to-battery interface for electronic shifting. You plug this into the Di2 battery over a length of Di2 wire to top up charge; a multi-season accessory that handles charging across successive battery and groupset generations. This is the Shimano EW-EC300 Charging Cable.
Battery Charger
A$ 62
Shimano Di2 battery charger — the wall-plug-to-battery interface for electronic shifting. You plug this into the Di2 battery over a length of Di2 wire to top up charge; a multi-season accessory that handles charging across successive battery and groupset generations. This is the Shimano EW-EC300 Charging Cable.

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Shimano EW-EC300 Charging Cable
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Shimano EW-EC300 Charging Cable