Introduction
Thank you for choosing the Didisky UV LED Flashlight. This device utilizes advanced 395 NM ultraviolet LED technology to reveal invisible stains, verify documents, and detect various substances. Its compact design, durable construction, and adjustable features make it a versatile tool for home, travel, and professional use. Please read this manual carefully to ensure proper operation and maintenance.
Safety Information
- Eye Protection: Avoid direct exposure of UV light to eyes. UV light can be harmful to vision. Do not shine the flashlight directly into anyone's eyes, including your own.
- Skin Exposure: Prolonged exposure to UV light on skin should be avoided.
- Children: Keep the flashlight out of reach of children. This is not a toy.
- Battery Safety: Ensure batteries are inserted with correct polarity. Do not mix old and new batteries, or different types of batteries. Remove batteries if the flashlight will not be used for an extended period.
- Operating Environment: For optimal detection, use the flashlight in a dark or dimly lit environment.
Package Contents
- 1 x Didisky UV LED Flashlight
- 1 x 18650 Battery Sleeve (for using 18650 rechargeable battery)
- 1 x AAA Battery Adapter (for using 3 AAA batteries)
Note: Batteries are not included and must be purchased separately.
Setup
Battery Installation
- Unscrew the tail cap of the flashlight by turning it counter-clockwise.
- For 3 AAA Batteries: Insert three AAA batteries into the provided AAA battery adapter, ensuring correct polarity (+/-). Then, insert the adapter into the flashlight with the positive end facing the flashlight head.
- For 1 x 18650 Rechargeable Battery: Place one 18650 rechargeable battery into the 18650 battery sleeve, ensuring correct polarity (+/-). Then, insert the sleeve with the battery into the flashlight with the positive end facing the flashlight head.
- Screw the tail cap back on clockwise until it is securely tightened.

Image: The Didisky UV LED Flashlight shown with its packaging and an illustration of the battery compartment, indicating where batteries are inserted.
Operating Instructions
Power On/Off and Light Modes
- To turn the flashlight ON, press the green button on the tail cap once. The flashlight will activate in High mode.
- To cycle through light modes (High, Low, Flash), press the button repeatedly while the flashlight is on.
- To turn the flashlight OFF, press the button after cycling through all modes, or press and hold the button briefly.

Image: The flashlight head illuminated, illustrating the three available light modes: High, Low, and Flash, with corresponding intensity bars.
Adjusting Zoom
- The flashlight features an adjustable zoom function. To adjust the beam, slide the head of the flashlight forward or backward.
- Sliding the head out (forward) will narrow the beam, providing a more focused spot.
- Sliding the head in (backward) will widen the beam, covering a larger area.

Image: A visual representation of the flashlight's zoom capability, showing a narrow, focused beam (zoom in) and a wide, diffused beam (zoom out) on a surface.
Detection Applications
The 395 NM UV light is effective for various detection tasks:
- Pet Stains: Detects dried urine stains from pets on carpets, rugs, and upholstery that are invisible to the naked eye.
- Counterfeit Detection: Verifies the authenticity of currency, driver's licenses, passports, and other official documents by revealing security features.
- Fluorescent Agents: Identifies products containing optical brighteners or fluorescent agents, often found in certain cleaning products or cosmetics.
- Scorpion Hunting: Scorpions glow under UV light, making them easier to spot in dark environments.
- Leak Detection: Can be used with UV dye to detect leaks in HVAC systems, automotive fluids, or plumbing.

Image: The UV flashlight illuminating a carpet, clearly showing dried pet urine stains that are otherwise invisible, with a dog nearby.

Image: The UV flashlight being used to inspect banknotes for security features and to examine jewelry for authenticity, demonstrating its use in counterfeit detection.

Image: The UV flashlight highlighting invisible stains on a bedspread and around a toilet in a bathroom, demonstrating its utility for cleanliness inspection.
Maintenance
Cleaning
- Wipe the flashlight body with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Keep the lens clean for optimal performance. Use a lens cleaning cloth if necessary.
Battery Care
- Remove batteries if the flashlight is not used for an extended period to prevent leakage and damage.
- Dispose of used batteries responsibly according to local regulations.
Storage
- Store the flashlight in a cool, dry place away from direct sunlight and extreme temperatures.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Flashlight does not turn on. | Dead or incorrectly inserted batteries. | Check battery polarity. Replace with fresh batteries. |
| Light is dim. | Low battery power. | Replace batteries. |
| Beam is inconsistent or flickering. | Loose tail cap or battery connection. | Ensure tail cap is tightly screwed. Check battery contacts for corrosion. |
| Cannot adjust zoom smoothly. | Dirt or debris in the zoom mechanism. | Gently clean the exterior of the flashlight head. Avoid forcing the mechanism. |
Specifications
- Brand: Didisky
- Model: UV Light Flashlight
- UV Wavelength: 395 NM
- Light Source: LED
- Light Modes: High, Low, Flash
- Zoom Function: Adjustable (Slide In/Out)
- Power Source: 3 x AAA batteries or 1 x 18650 rechargeable battery (not included)
- Material: Space-grade Aluminum Alloy
- Dimensions (L x W x H): 12.8 x 3.4 x 3.4 cm (5.04 x 1.34 x 1.34 inches)
- Weight: 110 grams (3.88 ounces)
- Water Resistance: Waterproof

Image: The Didisky UV LED Flashlight with its key dimensions (length, head diameter, tail diameter) and weight clearly indicated.

Image: A visual comparison demonstrating the superior brightness and wider coverage area of the Cree UV LED flashlight compared to a standard 12 LED UV light.
Warranty and Support
Didisky provides a one-year warranty for this product from the date of purchase. This warranty covers manufacturing defects and workmanship under normal use.
If you encounter any issues or have questions regarding your Didisky UV LED Flashlight, please do not hesitate to contact our customer support. To facilitate a quick resolution, please have your order details available when contacting us.
Contact Information: Please refer to your purchase platform or the seller's contact details provided at the time of purchase. We aim to respond to all inquiries within one business day.