An LED flashlight/taser
As a woman, you can find yourself walking alone, at night, in a place where you feel unsafe unexpectedly. Maybe a meeting ran late. You were meant to get out of there when there was still daylight, but now the sun has set and a neighborhood that’s cute at 6pm becomes sketchy at 8pm. Or you park your car in a perfectly full and bright parking lot, only to return to it later to find that it’s nearly empty and the lights are out. You can purchase a small LED flashlight/taser combo that will provide a nice bright light to illuminate your path and protection should something come up.