1. Introduction
The NEXTORCH K40 is a versatile and compact keychain flashlight designed for everyday carry (EDC). It integrates multiple light sources, including white, UV, red, and red/blue flashing lights, making it suitable for a wide range of applications from general illumination to emergency signaling and specialized detection tasks. Its robust construction and rechargeable design ensure reliability and convenience.
Figure 1: The NEXTORCH K40 Keychain Flashlight, showcasing its compact design and integrated keychain clip.
2. Product Components
The K40 flashlight comes with essential accessories to enhance its usability and portability.
- NEXTORCH K40 LED Rechargeable Keychain Flashlight: The main unit featuring multiple light sources and control buttons.
- Detachable Clip: A stainless steel clip for attaching the flashlight to hats, backpacks, or pockets.
- Keychain: For easy attachment to keys or other gear.
- Type-C Cable: For convenient recharging of the built-in battery.
- Multi-language Use Manual: Provides detailed instructions for operation and maintenance.
Figure 2: The K40 flashlight connected via its Type-C charging cable, illustrating the charging process and included accessories.
3. Setup
3.1 Initial Charging
Before first use, it is recommended to fully charge the NEXTORCH K40. The flashlight is equipped with a built-in 180 mAh Li-ion battery.
- Locate the Type-C charging port on the flashlight.
- Connect the provided Type-C cable to the flashlight and plug the other end into a compatible USB power source (e.g., computer, wall adapter).
- The power indicator will show the charging status. A full charge typically takes approximately 1.5 hours.
- Once fully charged, disconnect the cable. The power indicator provides an intimate reminder of the remaining power, allowing for timely replenishment.
A full charge provides up to 19 hours of runtime, depending on the mode used.
4. Operating Instructions
The K40 features dual on/off buttons for intuitive control over its various light modes and sources.
4.1 White Light Modes
The white light offers three brightness levels and a powerful strobe mode for diverse lighting needs.
- Low (10 lm): Ideal for night time small area lighting, providing up to 9 hours and 15 minutes of runtime with a beam distance of 12 meters.
- Medium (50 lm): Suitable for area range lighting, offering 1 hour and 30 minutes of runtime with a beam distance of 30 meters.
- High (300 lm): Designed for outdoor lighting, providing 1 hour of runtime with a beam distance of 78 meters.
- Strobe (700 lm): A powerful high-brightness strobe for on-the-go lighting defense or signaling. Activated with one key for immediate access.
Figure 3: Examples of the K40's powerful white light output in different applications, including night walks, maintenance, outdoor reading, and duty lighting.
4.2 Specialized Light Sources
The K40 integrates specialized light sources for unique applications.
- 365nm UV Light: Widely used for identification and detection purposes. This includes jade identification, tobacco and alcohol anti-counterfeiting identification, coin collection identification, and porcelain restoration detection.
- Red Light: Provides a striking red light pattern for close-range illumination and can serve as a location beacon.
- Red and Blue Flashing: Functions as an emergency signal light, suitable for work demands, daily life, or outdoor emergencies, enhancing travel safety.
Figure 4: Overview of the K40's multi-user modes, including white light, UV light, red light, and red&blue flash, highlighting their versatile applications.
Figure 5: Demonstrations of the K40's 365nm ultraviolet light in portable identification tasks, such as jade, banknote, anti-counterfeiting, and porcelain restoration.
Figure 6: The K40's red light for close-range illumination and red&blue flash for emergency signaling, shown in practical use scenarios.
5. Maintenance
To ensure the longevity and optimal performance of your NEXTORCH K40 flashlight, follow these maintenance guidelines:
- Cleaning: Wipe the flashlight body with a soft, damp cloth. Avoid using abrasive cleaners or solvents.
- Charging: Recharge the battery regularly, especially if the flashlight will not be used for an extended period, to maintain battery health.
- Storage: Store the flashlight in a cool, dry place away from direct sunlight and extreme temperatures.
- Durability: The K40 is designed with a metal barrel head, ensuring high strength and wear resistance. It is 1 meter drop-proof and IPX4 rain-proof, offering comprehensive protection against common environmental factors.
Figure 7: The K40 demonstrating its 1-meter impact resistance and IPX4 water-proof rating, highlighting its robust and durable construction.
6. Troubleshooting
If you encounter any issues with your NEXTORCH K40 flashlight, please refer to the following common troubleshooting steps:
- Flashlight not turning on: Ensure the battery is fully charged. Connect the flashlight to the Type-C charger and check the power indicator.
- Dim light output: This may indicate a low battery. Recharge the flashlight.
- Buttons unresponsive: Ensure there is no debris obstructing the buttons. Try pressing the buttons firmly.
If the problem persists after attempting these steps, please contact NEXTORCH customer support for further assistance.
7. Specifications
The following table details the technical specifications of the NEXTORCH K40 Keychain Flashlight, based on ANSI / PLATO-FL1 standards:
| Feature | White Light | Red/UV Light | Red/Blue Light | |||
|---|---|---|---|---|---|---|
| Strobe | High | Medium | Low | Constant on | Flash | |
| Light Output | 700 lm | 300 lm | 50 lm | 10 lm | — | — |
| Run Time | — | 1 h | 1 h 30 min | 9 h 15 min | ≥4 h | ≥19 h |
| Beam Distance | — | 78 m | 30 m | 12 m | — | — |
| Beam Intensity | — | 1520 cd | 232 cd | 40 cd | — | — |
| Impact Resistance | 1 m | |||||
| Waterproof | IPX4 | |||||
| Weight and Dimensions | Weight: 17 g Size: 73 mm (Length) × 16.5 mm (Head Diameter) × 16.5 mm (Body Diameter) | |||||
| Light Source | White / Red / Blue Light / UV LEDs | |||||
| Material | Aluminum Alloy + PC | |||||
| Battery | Built-in 180 mAh Rechargeable Battery | |||||
Figure 8: Detailed specifications of the K40 flashlight, including light output, runtime, beam distance, and physical characteristics.
Note: Above tested specifications are strictly based on the standard of ANSI / PLATO-FL1. Specifications might differ when using a different battery or testing in a different environment.
8. Warranty and Support
NEXTORCH stands behind the quality of its products. Your purchase of the K40 LED rechargeable keychain flashlight includes:
- Five-Year Warranty: Our professional team offers a five-year warranty on all NEXTORCH flashlights.
- Customer Support: If you have any questions about the product, require technical assistance, or need to claim warranty service, please feel free to contact NEXTORCH customer support.
For the most up-to-date contact information, please visit the official NEXTORCH website or refer to the contact details provided in your product packaging.
