Introduction
Thank you for purchasing the Wurkkos HD20 LED Headlamp. This manual provides detailed instructions for the safe and efficient use of your new headlamp. Please read this manual thoroughly before operation and retain it for future reference.
Safety Instructions
- Do not shine the light directly into eyes.
- Keep out of reach of children.
- Ensure the battery is inserted with correct polarity.
- Do not disassemble the headlamp, as this may damage the device and void the warranty.
- Avoid exposing the headlamp to extreme temperatures or direct sunlight for prolonged periods.
- Use only recommended batteries and charging cables.
Package Contents
Please check the package contents upon receipt. If any items are missing or damaged, contact your retailer.
- Wurkkos HD20 LED Headlamp (1 unit)
- Rechargeable 21700 Lithium-Ion Battery (1 unit)
- USB-C Charging Cable (1 unit)
- Headband (1 unit)
- User Manual (this document)
- Lanyard (1 unit)

Image: Wurkkos HD20 Headlamp, battery, USB-C cable, headband, and user manual.
Product Overview
The Wurkkos HD20 is a versatile LED headlamp designed for various indoor and outdoor activities. It features dual LEDs for both spotlight and floodlight illumination, USB-C rechargeable functionality, and a magnetic tail cap for hands-free use.
Key Features:
- Dual Output LEDs: Equipped with XP-L for focused spotlight and LH341D for wide floodlight, offering versatile lighting options.
- High Brightness: Up to 2000 lumens output for powerful illumination.
- USB-C Rechargeable & Power Bank Function: Conveniently charge the headlamp via USB-C and use it to charge other devices in emergencies.
- Magnetic Tail Cap: Allows attachment to metal surfaces for hands-free operation.
- IPX68 Waterproof: Designed to withstand harsh weather conditions and immersion.
- Compact and Portable: Measures 122mm in length and 30mm in head diameter, weighing 198g (with battery).

Image: The Wurkkos HD20 LED Headlamp, showcasing its compact design.
Setup
1. Battery Installation
- Unscrew the tail cap of the headlamp.
- Insert the provided 21700 Lithium-Ion battery with the positive (+) end facing towards the head of the lamp.
- Remove the small orange insulating disc from the battery if present.
- Screw the tail cap back on tightly to ensure proper contact and water resistance.

Image: Illustration of removing the insulating disc from the battery before installation.
2. Initial Charging
It is recommended to fully charge the battery before first use.
- Connect the USB-C charging cable to the headlamp's USB-C port.
- Connect the other end of the cable to a USB power source (e.g., USB wall charger, car charger, power bank, laptop).
- The indicator light on the side switch will show charging status:
- Blue: Charging
- Green: Fully Charged

Image: The HD20 headlamp connected to a USB-C charger, showing the charging indicator.
Operating Instructions
Basic Operation:
- Turn On/Off: Single click the side switch to turn the light ON or OFF.
- Change Brightness Levels: When ON, press and hold the side switch to cycle through Moonlight, Low, Medium, High. Release the switch at your desired brightness.
- Turbo Mode: Double click the side switch from ON to activate Turbo mode. Double click again to return to the previous mode.
- Special Modes (SOS, Strobe, Beacon): Triple click the side switch from ON to activate SOS mode. Double click to cycle through Strobe and Beacon. Single click to turn off.
- Switching LED Types: From ON, triple click the side switch to switch between XP-L (spotlight), LH341D (floodlight), or both combined. Press and hold to cycle through different LED combinations.

Image: Visual representation of the HD20's multiple lighting modes including Moonlight, Low, Medium, High, Turbo, SOS, Strobe, and Beacon.
Lockout Function:
The lockout function prevents accidental activation of the headlamp.
- Activate Lockout: From OFF, press and hold the side switch for 4 seconds. The light will flash once, indicating it is locked.
- Deactivate Lockout: From locked state, press and hold the side switch for 4 seconds. The light will flash once and turn on in Moonlight mode, indicating it is unlocked.

Image: The HD20 headlamp with an icon indicating the lockout function.
Power Bank Function:
The HD20 can be used as a power bank to charge other USB-C compatible devices in emergencies.
- Ensure the headlamp has sufficient battery charge.
- Connect your device to the headlamp's USB-C port using a compatible cable.
- The headlamp will begin charging your device.

Image: The HD20 headlamp connected to and charging a smartphone.
Charging
The Wurkkos HD20 features an integrated USB-C charging port for convenient recharging of its 21700 Lithium-Ion battery.
- Connect the provided USB-C cable to the headlamp's charging port.
- Plug the other end into a standard USB power adapter (5V/2A recommended).
- The LED indicator on the side switch will illuminate blue during charging and turn green when fully charged.
- Charging time may vary depending on the power source.
Battery Level Indicator:
When the headlamp is turned ON, the side switch LED indicator will display the battery status for 5 seconds:
- Green: Battery is good (over 30% charge).
- Red: Battery is low (under 30% charge).
- Flashing Red: Critical battery level, recharge or replace the battery immediately.

Image: The HD20 headlamp connected for USB-C charging, with indicators for charging and full charge.
Versatile Usage
The Wurkkos HD20 is designed for adaptability, offering multiple ways to illuminate your environment.
- Headlamp: Use with the included headband for hands-free lighting during hiking, camping, or work.
- Magnetic Attachment: The magnetic tail cap allows you to attach the headlamp to metal surfaces, providing stationary light for tasks like car repair.
- Pocket Clip: The dual-way clip enables attachment to pockets, belts, or backpack straps for convenient carrying and directional lighting.
- Handheld Flashlight: Detach from the headband to use as a powerful handheld flashlight.

Image: Magnetic tail cap and dual-way clip.

Image: IPX68 waterproof capability.

Image: Headlamp in use during hiking.
Maintenance
- Clean the headlamp body with a soft, damp cloth. Do not use abrasive cleaners.
- Lubricate the threads and O-rings regularly with silicone grease to maintain water resistance.
- If the headlamp will not be used for an extended period, remove the battery to prevent leakage.
- Store the headlamp in a cool, dry place.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Light does not turn on. | Battery is dead or incorrectly inserted. Headlamp is in lockout mode. | Recharge or replace battery, ensuring correct polarity. Deactivate lockout mode (press and hold switch for 4 seconds). |
| Light flickers or turns off unexpectedly. | Low battery. Loose tail cap. Dirty contacts. | Recharge battery. Tighten tail cap. Clean battery contacts with a cotton swab. |
| Cannot charge other devices (power bank function). | Headlamp battery is too low. Incompatible device. | Ensure headlamp has sufficient charge. Verify device compatibility with USB-C power output. |
| Water ingress. | Tail cap not tightened. Damaged O-rings. | Ensure tail cap is fully tightened. Inspect and replace O-rings if damaged. |
Specifications
| Feature | Detail |
|---|---|
| Model | HD20 |
| Brand | Wurkkos |
| Light Source | XP-L (Spotlight), LH341D (Floodlight) |
| Max Output | 2000 Lumens |
| Max Beam Distance | 144 meters |
| Battery Type | 1 x 21700 Lithium-Ion (included) |
| Charging | USB-C Rechargeable, Power Bank Function |
| Water Resistance | IPX68 (Waterproof) |
| Dimensions | 122mm (Length) x 30mm (Head Diameter) |
| Weight | 198g (with battery) |
| Color | Green (variant) |
| UPC | 772467460573 |

Image: The HD20 headlamp showing its physical dimensions (122mm length, 30mm head diameter).
Warranty and Support
Wurkkos products are covered by a limited warranty against manufacturing defects. For detailed warranty information, technical support, or customer service, please refer to the official Wurkkos website or contact your authorized retailer.
You can visit the Wurkkos store on Amazon: Wurkkos Store