The power button on a TravelScoot electric scooter (https://www.travelscoot.com/) came out, making it hard to turn on and off. Since you're supposed to turn it off when not in motion, this can be a safety issue. 3D print and glue in place. (The post hole is barely rectangular, so if it's not fitting, rotate 90 degrees.)
Prints very quickly without support.
TravelscootButton.stl | 73.5KB |