Introduction
Thank you for choosing the WUBEN L50 USB Rechargeable LED Flashlight. This manual provides detailed instructions for the safe and efficient use of your new flashlight. The WUBEN L50 is an ultra-bright 1200 lumens flashlight featuring 5 lighting modes and powered by an 18650 battery, designed for versatility and durability.

WUBEN L50 Flashlight, showing the main unit, 18650 battery, and the Micro-USB charging port.
Packing List
Please check the contents of your package upon arrival to ensure all items are present:
- WUBEN L50 Flashlight x 1
- 18650 Li-ion Battery (2600mAh) x 1 (Torch inside)
- Micro-USB Cable x 1
- Lanyard x 1
- Spare O-ring x 2
- User Manual x 1
- Certificate x 1
- Warranty Card x 1

All items included in the WUBEN L50 package.
Note: WUBEN L50 is compatible with 2 pcs CR123A batteries (not included).
Setup and Charging
Battery Installation
Before initial use, please remove the insulation plate located inside the flashlight to allow the battery to make contact.

Ensure the insulation plate is removed before first use.
Charging Instructions
The WUBEN L50 features a built-in Micro-USB charging port. To charge the flashlight:
- Locate the Micro-USB charging port on the flashlight.
- Open the rubber cap covering the port.
- Connect the provided Micro-USB cable to the flashlight and a suitable USB power source (e.g., computer, wall adapter).
- The indicator light will show the charging status.
Note: Without the protection of the rubber cap, the Micro-USB port is waterproof but not dustproof. Always cover the rubber cap for dustproof purposes.

Micro-USB charging port with protective rubber cap.
Charging Status Indication:
- Red light: Charging
- Green light: Charging finished
Improper charging states:
- Poor contact
- Battery damaged
- Light is on or wrong battery installation

Visual guide for charging status and potential issues.
Please only use batteries with a protection circuit board.
Operation
Power ON/OFF
Click the tail switch to turn on the flashlight and click again to turn it off.
Output Selections (Brightness Modes)
When the flashlight is on, tap the tail switch to cycle through the following brightness modes: Eco → Low → Med → High. Click the tail switch to turn it off.
The flashlight has a memory function and will remember the last used output selection (Eco, Low, Med, High), but it will not memorize flash modes (like SOS).

Brightness modes and approximate runtimes.
SOS Mode
When the flashlight is on, fast double tap the tail switch to activate SOS mode. Tap the tail switch again to exit SOS mode and return to the previously memorized brightness level.

SOS mode for emergencies.
Maintenance
- The O-Ring may be damaged after long-term use. Please replace the O-Ring in time to ensure the waterproof level of the product.
- Please use WUBEN batteries or WUBEN recommended batteries.
- When the product indicates low power, please charge or replace the battery promptly to avoid affecting the durability of the battery.
- Please use alcohol and a soft cloth to clean the conductive parts of the product regularly.

Gold-plated spring and trapezoidal threads for enhanced durability and conductivity.
Troubleshooting (FAQs)
If you encounter any issues with your WUBEN L50 flashlight, please refer to the table below for common problems and solutions:
| Problem | Causes | Solutions |
|---|---|---|
| Abnormal flash or failure to turn on |
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| Abnormal noise |
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If your problems are still not solved, please contact WUBEN Headquarters for after-sales service.
Specifications
Detailed technical specifications for the WUBEN L50 flashlight:
| Feature | Detail |
|---|---|
| LED Type | OSRAM P9 LED |
| LED Lifespan | 100,000 Hours |
| Body Material | Aerospace Grade Aluminum Body (Grade III hard anodized) |
| IP Rating | IP68 (2 meters underwater for 1 hour) |
| Lighting Modes | Eco, Low, Med, High, SOS (5 modes with memory function for brightness) |
| Max Output | 1200 Lumens |
| Max Beam Range | 200 Meters |
| Max Candelas | 10008 Candelas |
| Power Source | WUBEN 18650 Rechargeable Li-ion Battery (Included) or 2*CR123A battery (Not included) |
| Charging | Micro-USB (5V/1A, approx. 4 hours) |
| Impact Resistance | 1.5 Meters |
| Weight | 90g (without battery) | 138g (with battery) |
| Dimensions | 138.6mm (Length) x 26mm (Diameter) |
| Lens | Photochemical glass lens (up to 99% transmittance), Double sides ultra clear coated lens |
| Reflector | Electroplating reflective cup, Smooth plated aluminum alloy reflector |
| Switch | Tail switch (one button for 5 modes) |
All data from experiments of WUBEN lab according to the ANSI/NEMA FL1 standard, may vary because of different experiment equipment, experiment environment or other factors. Experiments are based on a WUBEN 18650 Li-ion battery (2600mAh).

Detailed view of the flashlight's internal and external components.

IP68 dustproof and waterproof rating, submersible up to 2 meters for 1 hour.
User Tips
- Charging Cable: The WUBEN L50 uses a Micro-USB charging port. Ensure you use the provided Micro-USB cable or a compatible one for optimal charging. It is not a USB Type-C port.
- Battery Care: For prolonged storage, remove the battery from the flashlight to prevent leakage or explosion. Store the product in a dry and ventilated place.
- Port Protection: Always keep the rubber cap over the Micro-USB charging port when not in use to protect against dust and maintain waterproofing.
Warranty and Support
Warranty Policy
- 15 Days Replacement: Within 15 days from the date of purchase, if the product has quality problems, customers can request free replacement.
- 1 Year Warranty: Within 1 year from the date of purchase, if the product has quality problems, WUBEN will offer free repair.
- 5 Years Warranty: Within 5 years from the date of purchase, if the product (accessories excluded) has quality problems, WUBEN will offer free repair for WUBEN registered customers.
- Battery Warranty: WUBEN offers a 1-year warranty for the rechargeable batteries; other included accessories are not covered by the warranty.
- Lifetime Maintenance: From the date of purchase, if the product has problems after 5 years, WUBEN will offer paid repair for WUBEN registered customers.
- If proof of purchase cannot be provided, the warranty will be counted from the date of manufacture.
- Any disputes will be resolved through coordination between the parties.
Beyond Warranty (Exclusions)
- Man-made damage.
- Damage caused by not following the instructions.
- Damage caused by improper use of the battery.
- Abnormal wear and tear.
- Damage caused by irresistible factors.
- Gifts.
The final interpretation right is reserved by WUBEN.
Contact Information
SHENZHEN SHENGQI LIGHTING TECHNOLOGY CO., LTD.
- E-mail: support@wubenlight.com
- Web: www.wubenlight.com
- Address: 202#, Building A, Jihe E-Business Park, No. 33 Yangmei Road, Bantian Street, Longgang District, Shenzhen, China
You can also get your e-warranty card and e-user manual by visiting: www.wubenlight.com/pages/product-registration
A PDF version of the user manual is available here.
Safety Warnings
- Please read the user manual carefully before using the product.
- The product will generate heat while working; please be cautious to avoid any possible harm.
- Do not shine directly into eyes to avoid harm.
- Keep the product away from children.
- Use WUBEN or WUBEN recommended batteries only.
- Do not disassemble the product, as it will void the WUBEN warranty policy.
- Do not throw the product into fire.
- This is not a diving product; do not use it underwater for extended periods.