Review on 🔦 Discover Portable Black Light Flashlight: Efficient 365nm UV Light Pet Urine Detector, Dry Stain Finder, Scorpion Hunter, Resin Curing Tool by George Thorson

I crushed two 18650 batteries trying to get them to work before realizing the positive side was not making contact. I had to remove the plastic cone before the 18650 battery got to the positive terminal. When I did that, the flashlight worked fine. To increase the distance between the battery and the handset, you need to make or buy a "18650 battery case". The flashlight works well too. At first I thought I had a 395nm wavelength flashlight because of the purple color of visible light. As soon as I pointed it at a fluorescent substance, the fluorescence was bright and strong.