The knog. Plus (40 lm, 20 lm) Bike Lights can be charged via a USB connection. Here are the steps:

- Connect the light to a USB port on your computer, a USB power supply or another USB charger.
- The lights are equipped with an integrated USB plug that you can plug directly into the USB port.
- Charging is usually indicated by an LED display that shows the charging status.

It is important to follow the instructions in the user manual to ensure that the device is charged correctly.