Lumintop Tool AA 2.0
This little light has been wonderful for me for over three years. It’s always in my pocket. I have taken it on multiple thru hikes now. Clips onto my hat very securely. I wear it as a cycle commuting head light. It’s just perfect. And affordable!
They will run off both a 14500 lithium battery or a standard AA battery. Although the output is much worse with a standard AA.
I always use the lithium ion battery. Amazon has a light and battery combo for 30$ usd.