---
product_id: 88244365
title: "ULTRAFIRE Black Light UV Flashlight, Super Power UV 395-405 nm LED WF-502B Blacklight Flashlights for Leak Detector, Pet Urine Stain, Bed Bug (Not Included Batteries)"
brand: "ultrafire"
price: "$42.15"
currency: USD
in_stock: true
reviews_count: 13
category: "Ultrafire"
url: https://www.desertcart.us/products/88244365-ultrafire-black-light-uv-flashlight-super-power-uv-395-405
store_origin: US
region: United States of America
---

# 395-405 nm UV wavelength 18650 rechargeable battery compatible 200 lumens max brightness ULTRAFIRE Black Light UV Flashlight, Super Power UV 395-405 nm LED WF-502B Blacklight Flashlights for Leak Detector, Pet Urine Stain, Bed Bug (Not Included Batteries)

**Brand:** ultrafire
**Price:** $42.15
**Availability:** ✅ In Stock

## Summary

> 🔦 Illuminate the unseen — never miss a detail again!

## Quick Answers

- **What is this?** ULTRAFIRE Black Light UV Flashlight, Super Power UV 395-405 nm LED WF-502B Blacklight Flashlights for Leak Detector, Pet Urine Stain, Bed Bug (Not Included Batteries) by ultrafire
- **How much does it cost?** $42.15 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/88244365-ultrafire-black-light-uv-flashlight-super-power-uv-395-405)

## Best For

- ultrafire enthusiasts

## Why This Product

- Trusted ultrafire brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Rugged & Reliable:** Premium aluminum build with IP65 water & dust resistance for any environment
- • **Clip-On Convenience:** Secure clip design keeps your flashlight ready for action on the go
- • **Multi-Use Essential:** From pet urine to currency authentication, a must-have tool for pros
- • **Precision Zoom Focus:** Adjustable zoom lets you scan wide yards or tight spots effortlessly
- • **Ultra-Bright UV Power:** 30% brighter UV LED for pinpoint stain & leak detection

## Overview

The ULTRAFIRE WF-502B is a professional-grade UV flashlight featuring a powerful 395-405 nm LED that is 30% brighter than typical models. It offers adjustable zoom focus, durable aluminum construction with IP65 water and dust resistance, and compatibility with rechargeable 18650 or CR123 batteries (not included). Ideal for pet stain detection, leak finding, forensic use, and security verification, this compact, clip-on flashlight is engineered for precision and reliability in any setting.

## Description

ULTRAFIRE Black Light UV Flashlight, Super Power UV 395-405 nm LED WF-502B Blacklight Flashlights for Leak Detector, Pet Urine Stain, Bed Bug (Not Included Batteries) - desertcart.com

Review: Works great - An amazing product
Review: Better than expected for the price. Uses 18650. Focusable. - Very nice for the price. I've been using a pocket UV flashlight powered by 3xAAA for the longest time for lures and circuit board work. Recently I changed to a different resin and that old flashlight just takes forever and burns through batteries like crazy. (AAA flashlight on left, this ultrafire on the right in photos) Was looking for an 18650 or 21700 powered flashlight since I have such batteries readily available. This thing kicks. Far more powerful and it has a focusable lens which is superb for when I only need to cure in a small area. It has no charging circuit. So you will need a way to charge your 18650 outside the device. Very solid construction. Pleasantly surprised. The clip is secured with screws not a tension ring. Total game changer. Never have to worry the flashlight escaped the clip. Size is nice imo. Good hand fit for holding normally. Little awkward if you want to hold it like a penlight though because it's back heavy. Only con: no lanyard/ring hole I would buy more of these for ice fishing (jigging glow in the dark lures) but without a way to secure it to my person I might have to pass. There are holes in the clip if you wanted to tie on there but then it gets funky not hanging straight.

## Features

- Extreme Power UV Blacklight Flashlight: Professional grade UV flashlight black light, used the newest model UV LED Chip, 395-405 nm, UltraFire UV black light is 30% Brighter than other lights, helps you to find urine&stains EVEN in indoor or streetlight, best choice for pet dog cat urine detection.
- Zoom In and Zoom Out: With Focus Adjustable Zoomable Function that you can see your entire yard. Enjoy the fun of watching small animals at night.
- Long Running Time: UltraFire UV Flashlight is Premium Aluminum Construction with anti abrasive surface treatment, non-slip textured grip, clip. IP65 water-resistant & dustproof protection class. Power by 1*18650 3.7v rechargeable battery or 2*CR123 batteries(Batteries not included).The battery needs to be purchased by yourself. You can search for the battery model on desertcart to find the right battery.
- Save Your Money and Time: This uv blacklight flashlight could work as portable pet dog cat urine detector light, flashlight blacklight finder ,Contamination and leaks detector, Authenticate currency, driver license, official identification cards, passports. Essential tool for medical forensics, HVAC repair and so on. Help you to save thousands of dollars, efforts and time.
- 24-Hour Service: If there is any problem, please contact us, we will provide you with a satisfactory solution within 24 hours!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07JKD522X |
| Assembled Height | 2 centimeters |
| Assembled Length | 1 centimeters |
| Assembled Width | 2 centimeters |
| Batteries | 1 Lithium Ion batteries required. |
| Batteries Included? | No |
| Batteries Required? | Yes |
| Battery Cell Composition | Lithium |
| Battery Description | 18650 or 2*cr123 |
| Best Sellers Rank | #103,187 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,114 in Handheld Flashlights |
| Brand | ULTRAFIRE |
| Bulb Features | 30% brighter than other UV flashlights, zoom function, used for pet urine detection, security/ID verification, machinery leaks detection, mineral lighting, and identification |
| Color | Black |
| Customer Reviews | 4.4 4.4 out of 5 stars (1,671) |
| Date First Available | October 19, 2018 |
| Finish Type | Black |
| Finish types | Black |
| Included Components | Battery |
| Is Discontinued By Manufacturer | No |
| Item Weight | 3.67 ounces |
| Item model number | WF-502B |
| Light Output Maximum | 200 Lumens |
| Light Source Type | UV LED |
| Manufacturer | UltraFire |
| Material | Aluminum |
| Mounting Type | Clip-on |
| Number of Batteries | 1 Lithium Ion batteries required. |
| Number of Lights | 1 |
| Part Number | UN788000142493 |
| Power Source | Battery Powered |
| Product Dimensions | 0.39 x 0.79 x 0.79 inches |
| Shape | Cylindrical |
| Special Feature | Adjustable |
| Special Features | Adjustable |
| Style | Tactical |
| Switch Style | One-way |
| UPC | 788000142493 |
| Voltage | 3.7 Volts |
| Warranty Type | Seller |
| Water Resistance Level | Water Resistant |
| Wattage | 10 watts |
| White Brightness | 200 Lumens |

## Product Details

- **Color:** Black
- **Light Source Type:** UV LED
- **Material:** Aluminum
- **Power Source:** Battery Powered
- **Special Feature:** Adjustable

## Images

![ULTRAFIRE Black Light UV Flashlight, Super Power UV 395-405 nm LED WF-502B Blacklight Flashlights for Leak Detector, Pet Urine Stain, Bed Bug (Not Included Batteries) - Image 1](https://m.media-amazon.com/images/I/51FF3motBEL.jpg)

## Questions & Answers

**Q: Will this light dry and harden UV glues, like those used in fly tying?**
A: Works great for the "Damn Good" brand UV glue.  I used it to fix a broken pair of glasses.  The frame around one lens had broken, and I couldn't get new frames for the existing lenses.  Just made the mend last night.  I'm not certain how long an exposure ti takes--I gave it about 2 minutes.  The glue's surface was still a little soft,  but an hour later it was completely hard.   Quite a bright light and I would be careful not to expose your skin or eyes to the beam.  I will use it for fly tying as well and expect it will work very well.

**Q: how long to completely cure and what brand of uv resin has anyone used with this light?**
A: works great with loon, solraez, gulff probably the fastest. Average cure 10-20 seconds is my estimate, get a good 18650 battery though.

**Q: One part of the description indicates it operates up to the 405 nm another says only up to 395 which is it?**
A: There is 2 available nm that I know of. 365 and 395. 395 has a more purple more intense beam. Better for resins and glow stuff. 365 has a less visible beam better for seeing uv marks or ink doesn’t work as well for drying resin or charging glow in the dark stuff

**Q: I have two cr123 batteries which way do they go in? It says use cr123 batteries... then how do they go in??**
A: + goes in first

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works great
*by T***N on January 10, 2026*

An amazing product

### ⭐⭐⭐⭐⭐ Better than expected for the price. Uses 18650. Focusable.
*by J***O on March 23, 2025*

Very nice for the price. I've been using a pocket UV flashlight powered by 3xAAA for the longest time for lures and circuit board work. Recently I changed to a different resin and that old flashlight just takes forever and burns through batteries like crazy. (AAA flashlight on left, this ultrafire on the right in photos) Was looking for an 18650 or 21700 powered flashlight since I have such batteries readily available. This thing kicks. Far more powerful and it has a focusable lens which is superb for when I only need to cure in a small area. It has no charging circuit. So you will need a way to charge your 18650 outside the device. Very solid construction. Pleasantly surprised. The clip is secured with screws not a tension ring. Total game changer. Never have to worry the flashlight escaped the clip. Size is nice imo. Good hand fit for holding normally. Little awkward if you want to hold it like a penlight though because it's back heavy. Only con: no lanyard/ring hole I would buy more of these for ice fishing (jigging glow in the dark lures) but without a way to secure it to my person I might have to pass. There are holes in the clip if you wanted to tie on there but then it gets funky not hanging straight.

### ⭐⭐⭐⭐ Strong, effective black light—just be ready for the unusual battery
*by M***E on August 3, 2025*

This is a powerful UV flashlight that really does its job well. Whether you’re checking for pet stains, leaks, or other hidden messes, the beam is strong and clear, and it reveals details even in well-lit areas. The one thing to note: it requires a 18650 rechargeable battery, which isn’t something most people have lying around. You’ll likely need to order it separately, and it’s not included with the flashlight. Still, excellent performance overall—just be sure to have the right power source ready to go.

## Frequently Bought Together

- ULTRAFIRE Black Light UV Flashlight, Super Power UV 395-405 nm LED WF-502B Blacklight Flashlights for Leak Detector, Pet Urine Stain, Bed Bug Not Included Batteries
- SOLAREZ Fly Tie UV Cure Resin - Ultra Thin Bone Dry Formula (0.5 oz Bottle w/Brush applicator tip) Fly Tying, Fly Fishing, Build Fly Heads and Bodies
- SOLAREZ UV Fly Tying Resin | Epoxy Hard Cure

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-08*