Kemo M172N – USB Bicycle Dynamo Charger, 5V up to 800mA

Kemo M172N: USB charging from your bicycle's dynamo

The Kemo M172N allows you to use the energy produced by your bicycle's dynamo to power or charge compatible USB devices while pedaling, such as smartphones, GPS navigators and portable music players.

The female USB-A socket supplies approximately 5 V stabilized , with a 5% tolerance. The available current depends on the dynamo and driving conditions: up to approximately 500 mA with a standard dynamo and up to 800 mA with a dynamo of adequate power . Compatibility and charging speed also depend on the requirements of the connected device.

Selection between lighting and charging

The switch allows you to choose whether to direct the dynamo's power to the bike lights or to USB charging. Simultaneous use of lights and device charging is not permitted. The LED indicates the presence of voltage generated by the dynamo.

Main features

• Connection to 6V bicycle dynamo.
• USB-A output with stabilized voltage of approximately 5 V.
• Current up to 800 mA, depending on available power.
• Switch to select lighting or USB charging.
• Fixing to the handlebars or frame with a cable tie.
• USB-A male to micro USB cable included.
• Made in Germany.

Technical specifications

• Make and model: Kemo M172N
• Input: 6V dynamo
• Maximum input voltage indicated: 70 V
• Output: USB-A female
• Output voltage: about 5V stabilized, 5% tolerance
• Current with standard dynamo: up to approximately 500 mA
• Current with dynamo of adequate power: up to 800 mA
• Indication: LED voltage presence/charging
• Dimensions: approx. 70 × 62 × 42 mm, excluding switch
• Fixing: to handlebars or frame with clamp
• Cable included: USB-A male/micro USB

Installation and compatibility

Follow the manual and illustrations for connection and assembly. When properly installed, the device is suitable for use in the rain. The product sheet also includes use with 24–36 V e-bike batteries: for this connection, follow the instructions in the manual.

Devices with connectors other than micro USB require a compatible cable, which must be purchased separately. The presence of a USB port does not guarantee charging for every device: check that the power requirements are compatible with the available output.

You can use a compatible USB backup battery, not included , to provide a power reserve. Check the operating modes of the backup battery you choose.