NITECORE NU21 Ultra Lightweight Dual Beam Outdoor Headlamp User Guide
- June 12, 2024
- Nitecore
Table of Contents
NITECORE NU21 Ultra Lightweight Dual Beam Outdoor Headlamp
Specifications
- Dimensions: 60.1mm x 33mm x 25.5mm (2.37″ x 1.30″ x 1.00″) (Bracket Included)
- Weight: 44g (1.55 oz) (Bracket and Headband Included)
Accessories
- Headband
- USB-C Charging Cable
Technical Data
Features
- Dual beam USB-C rechargeable outdoor headlamp
- Specially designed for outdoor activities
- With a max output of 360 lumens
- Utilizes a unibody optical lens system with various facets for reflecting a uniform and soft light
- Built-in 500mAh Li-ion battery
- Highly efficient constant current circuit provides a stable output with a max runtime of 37 hours
- Designed with two buttons different in shape and touch, offering easy one-handed operation
- 4 brightness levels, 2 light sources and 3 special modes available
- Built-in intelligent Li-ion battery charging circuit with a USB-C charging port
- Designed with 4 power indicators to indicate the remaining battery power
- Made from durable PC material
- Waterproof and dustproof rating in accordance with IP66
- Impact resistant to 1 meter
Charging Function
The NU21 is equipped with an intelligent charging system. Please charge the
battery before the first use.
Power Connection: As illustrated, uncap the charging port and use the USB
cable to connect an external power supply to the charging port to begin the
charging process.
Charging Indication: During the charging process, 4 power indicators on
the top will flash to inform the user. When the battery is fully charged, 4
power indicators will become steadily turned on. The charging time is approx.
1.5h (charged via the 5V/0.5A adapter). When fully charged, the standby time
is approx. 12 months.
Power Button / MODE Button
- The Power Button is used for turning on / off the light and adjusting brightness levels.
- The MODE Button is designed for switching light sources.
On / Off
- When the light is off, long press the Power Button for 1 second to access LOW.
- When the light is on, long press the Power Button or MODE Button for 1 second to turn it off.
White Light
- When the light is off, long press the Power Button for 1 second to access LOW.
- When the light is off, double press the Power Button to access ULTRALOW.
- When the light is on, short press the Power Button to cycle through the following brightness levels: LOW – MID – HIGH.
Note: The HIGH Level will step down to prevent overheating and prolong battery life when it runs for a prolonged period.
Red Light
- When the light is off, long press the MODE Button for 1 second to turn on the Red Light.
- When the Red Light is on, short press the Power Button to switch between CONSTANT-ON and SLOW FLASHING.
Light Sources Switching
When the light is on, short press the MODE Button to switch between White
Light and Red Light.
Special Modes (SOS / BEACON)
- When the headlamp is in any status, double press the MODE Button to access SOS.
- When either special mode is on, short press the Power Button to switch between SOS and BEACON. Double press the MODE Button again to return to the previous status.
Lockout / Unlock
- When the headlamp is off, long press both buttons for 2 seconds until the headlamp flashes 3 times to indicate access to the Lockout Mode. In the Lockout Mode, any brightness levels or special modes are unavailable, and the headlamp will flash once to indicate this status when pressing either button.
- When in the Lockout Mode, long press both buttons for 2 seconds again until the ULTRALOW is on to indicate the unlock status.
Note: The NU21 will be automatically unlocked when charged in the Lockout Mode.
Power Indication
When the light is off, short press the MODE Button, and the corresponding
power indicators next to the MODE Button will be on in turn and go off after 2
seconds.
Note: The battery should be recharged when the output appears to be dim
or the headlamp becomes unresponsive due to low power.
Warnings
- CAUTION! Possible dangerous radiation! Don’t look into the light! May be dangerous for your eyes.
- Please recharge the product every 6 months when left unused for a prolonged time.
- When the product is kept in the backpack, please activate the Lockout Mode to prevent accidental activation.
- DO NOT disassemble or modify the headlamp as doing so will cause damage to it and render the product warranty invalid. Please refer to the warranty section in the manual for complete warranty information.
- Dispose of the device/batteries in accordance with applicable local laws and regulations.
Warranty Service
All NITECORE® products are warranted for quality. Any DOA / defective product
can be exchanged for a replacement through a local distributor/dealer within
15 days of purchase. After that, all defective / malfunctioning NITECORE®
products can be repaired free of charge within 24 months from the date of
purchase. Beyond 24 months, a limited warranty applies, covering the cost of
labor and maintenance, but not the cost of accessories or replacement parts.
The warranty will be nullified if:
- the product(s) is/are broken down, reconstructed and/or modified by unauthorized parties;
- the product(s) is/are damaged due to improper use.
For the latest information on NITECORE® products and services, please contact a local NITECORE® distributor or send an email to service@nitecore.com.
All images, texts and statements specified herein this user manual are for reference purposes only. Should any discrepancy occur between this manual and information specified on www.nitecore.com, Sysmax Innovations Co., Ltd. reserves the rights to interpret and amend the content of this document at any time without prior notice.
Worldwide Warranty Service
This is the certificate of authenticity if this item and we confirm that it
has been subjected to the most exacting quality controls by SYSMAX Innovations
Co., Ltd.
NOTE: Please ensure this warranty card is fully completed by the
distributor or retailer after purchasing the product. Should the product fail
to operate correctly during the warranty period, it may be returned with the
completed warranty card and original sales receipt to the retailer or local
distributor for replacement or repair.
Customer Service Email:
service@nitecore.com
SYSMAX Innovations Co., Ltd.
TEL: +86-20-83862000
FAX: +86-20-83882723
E-mail: info@nitecore.com
Web: www.nitecore.com
Address: Unit 6355, 5/F, No. 1021 Gaopu Road, Tianhe District, Guangzhou,
510653, Guangdong, China
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