Shimano Di2 EW-EC300 Charger

Seamless Power. Dual Versatility.

The EW-EC300 is a high-quality USB cable that connects your power source to your bike's brain. In the new 12Speed ecosystem, charging is centralized through the rear derailleur, allowing you to top up your internal BT-DN300 battery in minutes. But it doesn't stop there. This same cable is also compatible with Shimano's integrated power meter cranksets, making it a multi-purpose tool that simplifies your charging setup both at home and in your travel bag.

Why the EW-EC300 is an Essential Accessory:

• Centralized Charging Interface: Designed to plug directly into the charging port of Dura-Ace RD-R9250 and Ultegra RD-R8150 rear derailleurs. No disassembly required. Just plug in and power up.

• Power Meter Compatible: This one cable handles everything. It fits the charging ports of FC-R9200-P and FC-R8100-P power meter cranks, ensuring your data is as reliable as your shifting.

• Generous 1.7m Length: The extra-long 1700mm cable gives you plenty of reach, allowing you to charge your bike conveniently from a wall outlet or a laptop without having to position your bike awkwardly close to the power source.

• Universal USB Type-A Connection: Features a standard USB-A plug on one end, making it compatible with almost any modern wall adapter, power bank, or computer port (5.0V DC / 1.0A DC recommended).

• Lightweight & Travel-Ready: Weighing only ~150g, it’s light enough to live in your gear bag permanently, ensuring you’re never caught out with a low battery before a big ride.

• Secure Connection: The specialized connector is designed for a precise, "no-wiggle" fit, protecting the sensitive ports on your high-end components during the charging process.

Technical Specifications:

• Model: EW-EC300

• Connector Type: Specialized (Component side) / USB Type-A (Power side)

• Cable Length: 1.5m to 1.7m (standard 1700mm)

• Input Requirement: 5.0 V DC, at least 1.0 A

• Weight: ~150g

• Compatibility: Shimano 12Speed Di2 derailleurs & Power Meter cranks

The Alegro Perspective: The EC300 is the "don't leave home without it" item of the 12Speed world. While your Di2 battery will last for many hundreds of miles, having this cable in your car or travel bag is the ultimate peace of mind. It’s significantly more affordable and easier to use than the old internal battery chargers, and the dual-compatibility with power meters is a huge win for those who want a minimalist maintenance kit.

Direct Connection. Universal USB Power. Keep your Drivetrain Ready with Shimano.