These 3W UVC lights are portable and useful for sterilizing surfaces including rental car touch points, door knobs, bathroom fixtures, etc. They do not emit ozone.
The folding version is AA powered and the smaller version has a rechargeable lithium battery.
These are great for travel and can be used in situations where hand sanitizing gel would not be practical. You can also use these to sterilize masks by exposing all sides to the light.