NU25
User Manual
Features
• Lightweight multi-output rechargeable headlamp
• Specially designed for outdoor activities
• Utilizes a CREE XP-G2 S3 LED to emit a maximum output of 360 lumens
• Onboard High CRI white light (CRI≥90, colour temperature of 4500K) and auxiliary red light
• Main light utilizes an orange peel reflector for a uniform and soft beam
• Maximum beam intensity up to 1650cd and beam distance up to 81 meters
• Built-in 610mAh Li-ion polymer battery
• High efficient constant circuit with runtime up to 160 hours
• 4 brightness levels, 3 light sources and 3 special modes selectable
• Intelligent Li-ion battery charging circuit (via Micro-USB charging port)
• Built-in power indicator reports remaining battery power
• A flood lighting system provides 100° beam angle
• Tilting mechanism allows for 60° adjustment
• Made from durable PC material
• IP66 rating
• Impact resistant to 1 meter
Specifications
Size: 2.19”×1.36”×0.91” ( 55.5mm×34.6mm×23.2mm)(holder included)
Weight: 0.99oz (28g) (holder included)
Accessories
Headband, USB cable
Technical Parameter
FL1 STANDARD Turbo
High
Mid
Low
Auxiliary
White Light
Red Light
(low)
Red Light
(high)
Red Caution
Light
SOS
Beacon
360
LUMENS
190
LUMENS
38
LUMENS
1
LUMEN
20
LUMENS
0.9
LUMEN
13
LUMENS
13
LUMENS
360
LUMENS
360
LUMENS
*30min
5h
8h
160h
6h15min
68h
7h45min
13h
─
─
81m
61m
27m
3.8m
5.5m
─
4m
─
─
─
1650cd
950cd
190cd
3.7cd
7.5cd
─
4cd
─
─
─
1m (Impact Resistance)
IP66 Rating
NOTICE:
The above data has been measured in accordance with the international flashlight testing standards
ANSI/NEMA FL1 using a built-in Li-ion battery (3.7V 610mAh) under laboratory conditions. The data may vary
slightly during real-world use due to battery type, individual usage habits and environmental factors.
* The runtime for Turbo mode is the testing result before starting temperature regulation.
Operation Instruction
NU25 has two switches as shown in the diagram:
Main Light
ON/OFF
Turn on: When the light is off, tap the main switch to turn on the
main light and enter the lowest brightness level.
Turn off: After the light is switched on, either wait for 3 seconds then press any switch to turn off the light, or
press and hold the red light switch to turn off the light right away.
Changing Brightness Level of Main Light
Within 3 seconds after the light is turned on, tap the main switch in succession to cycle through Low-Mid-High-
OFF.
Auxiliary White Light
ON/OFF
Turn on: When the light is off, press and hold the main switch for 1 second to turn on the auxiliary white light.
Turn off: After the light is switched on, either wait for 3 seconds then press any switch to turn off the light, or
press and hold the red light switch to turn off the light right away.
Auxiliary Red Light
ON/OFF
Turn on: When the light is off, tap the red light switch to enter the red light (low).
Turn off: After the light is switched on, either wait for 3 seconds then press any switch to turn off the light, or
press and hold the red light switch to turn off the light right away.
Changing Brightness Level of Auxiliary Red Light
Within 3 seconds after the red light is turned on, tap the red light switch in succession to cycle through Red Light
(low)-Red Light (high)-Red Caution Light-OFF.
Direct Access to Turbo
When the main light is on, press and hold the main switch for 1 second to enter Turbo (360 lumens).
NOTE:
The Turbo mode will run for 30 second before it steps down to prevent overheating. The TURBO mode
can be reactivated immediately, but if the NU25 is still overheated, the light will remain at lower level to protect
the components and prevent damage caused by overheating.
SOS/Location Beacon
In any state (non-locking), press and hold the main switch for 3 seconds to enter SOS, press the main switch
again within a 3 second interval to activate location beacon. Press the main switch again will turn off the light.
To exist special modes at any time, wait for 3 seconds then press any switch to turn off the light.
Red Light Switch
Main Switch
Lockout/Unlock
In any state (non-locking), press the two switches simultaneously to lockout the NU25. A red indicator will blink
once to notify the user. In lockout state, the NU25 cannot be turned on. If any switch is pressed, the red indicator
will blink once to notify user.
To unlock, press the two switches simultaneously again to activate the NU25 and enter the Low mode.
Power Tips
When the NU25 is turned off, press and hold the red light switch, the red indicator will blink to report its
remaining power:
1. 3 flashes represent battery level above 50%.
2. 2 flashes represent battery level below 50%.
3. 1 flash represents battery level below 10%.
NOTE:
Recharge the NU25 when its output appears to be dim or the flashlight becomes unresponsive.
Recharging
This product is USB rechargeable. Connect one end of the USB
cable to the charging port of the NU25 and the other end to a
power supply as shown in the diagram. Under normal charging
conditions, a red indicator will illuminate steady. When charging
is complete, the NU25 will automatically terminate charging and
the red indicator will turn green. It takes approximately 2 hours
to fully charge the headlamp. After fully charged, the standby
time is approximately 1 year.
Caution
1. Avoid direct eye exposure.
2. Do not assemble or modify this product, as doing so voids the warranty.
Warranty Service
All NITECORE
®
products are warranted for quality. DOA/defective products can be exchanged for replacement
through a local distributor/dealer within the 15 days of purchase. After 15 days, all defective / malfunctioning
NITECORE
®
products will be repaired free of charge for a period of 24 months from the date of purchase. After 24
months, a limited warranty applies, covering the cost of labor and maintenance, but not the cost of accessories or
replacement parts.
The warranty is nullified in all of the following situations:
1. The product(s) is/are broken down, reconstructed and/or modified by unauthorized parties.
2. The product(s) is/are damaged through improper use.
※
For the latest information on NITECORE
®
products and services, please contact your national NITECORE
®
distributor or send an email to service@nitecore.com. The NITECORE official website shall prevail in case of
any product data changes.
Worldwide Warranty Service
Model number
Date of purchase
————————————————————— —————————————————————
Serial number
Store Stamp
————————————————————— —————————————————————
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
Thanks for purchasing NITECORE!
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Made in China
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