The Shimano EW-EC300 is the charging cable for Shimano 12-speed Di2 road groupsets. It plugs into the rear derailleur and can also charge Shimano power meters.

• Charging connector for RD-R9250 (and other 12-speed Di2 rear derailleurs)
• Also charges the FC-R9200-P power meter
• USB Type-A connector
• Cable length: 1.5 m