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Shimano |Shimano Battery Charger SM-BCR2
The Shimano Di2 Internal battery charger makes charging your Di2 electronic shifting system a snap. With its indicator lights that tell you when it's charging and when it's fully charged, you don't have to guess. Plus, a full charge takes just 1. 5 hours. But don't worry too much about missing a charge--your system will only need to be charged every couple months.
Overview
The Shimano Di2 Internal battery charger makes charging your Di2 electronic shifting system a snap. With its indicator lights that tell you when it's charging and when it's fully charged, you don't have to guess. Plus, a full charge takes just 1. 5 hours. But don't worry too much about missing a charge--your system will only need to be charged every couple months.