Nitecore NU25 360 Lumen USB Rechargeable Headlamp Instruction Manual

1. Overview

The Nitecore NU25 is a versatile and lightweight USB rechargeable headlamp designed for various outdoor activities. It features three distinct light sources: a powerful white LED, an auxiliary high CRI white LED, and an auxiliary red LED, offering a range of lighting options for different scenarios.

Image 1.1: Nitecore NU25 Headlamp, showing the device, headband, USB charging cable, and wall adapter.

2. Package Contents

• Nitecore NU25 Headlamp
• Headband
• USB-Micro USB Charging Cable
• LumenTac wall charging adapter

3. Product Features

• 360 Lumen Wide Beam: Features a CREE XP-G2 S3 LED for a primary output, capable of 360 lumen max output and 88 yards of throw, suitable for biking, jogging, and trekking.
• Auxiliary High CRI and Red LED Lights: The high CRI auxiliary light produces richer, more natural-looking colors for tasks requiring fine detail. The auxiliary red LED preserves night vision.
• Compact and Lightweight: Weighs only 0.99oz (without headband) and is small enough for daily use and long excursions.
• No Charger Needed: Built-in micro-USB battery for easy on-the-go charging with any USB power source.

Image 3.1: The Nitecore NU25 demonstrating its powerful 360 lumen beam in a dark outdoor setting.

Image 3.2: Visual representation of the headlamp's three distinct light sources.

Image 3.3: The micro-USB charging port with its protective rubber cover, highlighting the advanced power management system.

Image 3.4: The Nitecore NU25's compact and lightweight design, shown resting in the palm of a hand.

4. Setup

4.1 Charging the Battery

1. Locate the micro-USB charging port on the side of the headlamp.
2. Open the rubber cover protecting the port.
3. Connect the micro-USB charging cable to the headlamp and to any USB compatible power source (e.g., computer, wall adapter, power bank).
4. The charging indicator will show the charging status.
5. Once fully charged, disconnect the cable and securely close the rubber cover to maintain water resistance.

4.2 Attaching and Adjusting the Headband

1. Thread the provided headband through the attachment points on the headlamp.
2. Adjust the length of the headband to ensure a comfortable and secure fit around your head.
3. The headlamp can also be detached from the headband for alternative mounting options, such as clipping onto a hat brim.

5. Operating Instructions

5.1 Power On/Off and Brightness Adjustment (White Light)

1. To turn on the white light, press and hold the main power button (usually marked with a power symbol) for approximately 1 second.
2. Once on, short press the main power button repeatedly to cycle through brightness levels: Ultra-low → Low → Mid → High.
3. To turn off, press and hold the main power button for approximately 1 second.

5.2 Activating Auxiliary Lights (Red & High CRI)

1. To activate the auxiliary lights, press and hold the auxiliary light button (usually marked with 'R' or a similar symbol) for approximately 1 second.
2. Short press the auxiliary light button repeatedly to cycle through modes: Red Light → High CRI Light → Red Caution Light (flashing).
3. To turn off, press and hold the auxiliary light button for approximately 1 second.

5.3 Special Modes (SOS & Beacon)

1. With the white light off, double-press the main power button to activate the Turbo mode.
2. From Turbo mode, double-press the main power button again to cycle through SOS → Beacon modes.
3. To exit special modes, short press the main power button.

6. Maintenance

• Cleaning: Wipe the headlamp with a soft, damp cloth. Avoid harsh chemicals or abrasive materials.
• Storage: Store the headlamp in a cool, dry place away from direct sunlight and extreme temperatures.
• Water Resistance: The NU25 has an IP66 rating, meaning it is protected against dust ingress and powerful water jets. Ensure the charging port cover is securely closed to maintain water resistance.

7. Troubleshooting

• Light not turning on: Ensure the battery is charged. Connect the headlamp to a power source to charge.
• Dim light output: The battery may be low. Recharge the headlamp.
• Intermittent operation: Check the charging port for debris and ensure the cable is securely connected during charging.

8. Specifications

Image 8.1: Detailed specifications table for the Nitecore NU25 headlamp.

9. Official Product Video

10. Warranty and Support

Nitecore products are manufactured to high-quality standards. For specific warranty details, product registration, or technical support, please refer to the official Nitecore website or contact their customer service directly. Keep your proof of purchase for warranty claims.