Review on Alonefire SV15 LED 3W Small UV Flashlight 365Nm USB Rechargeable Portable Ultraviolet Black Light Flashlight Mini Stain Minerals Money Pet Urine Detector With Aluminium Case, Built-In Battery by James Cruz

Warning sheet indicates as the 1st rule to remove the insulating film on the "battery surface transparent before use". I carefully unscrewed the cap and removed the film off the battery. Screwed cap back on, turned on light and smelled burning, light didn't work. Unscrewed it, noticed the insulation had burnt off the wiring.Turns out the rechargeable battery is pretty hazardous and could have caught fire or even exploded.Awful to include warning to take off the film from the battery. For safety purposes I had the battery removed from the device to avoid it touching with the wires again and it's outside the home.