Nitecore NU25 UL Rechargeable LED Head Torch

The Nitecore NU25 UL rechargeable head torch is an alternate version to the New NU25 head torch and offers the same specification of a spot LED and a flood LED, that can be used individually or combined and a two red LEDs, but with a ultra lightweight head band design.

The high combined white light provides a maximum output of 400 lumens from a the spot + flood LED with a colour temperature 5500 K, which will run for 30 seconds before stepping down due to the temperature regulation. Utilising a unibody optical lens system for a high light transmission of 94%, the NU25 UL is specifically designed for reflecting a uniform and soft light that provides over a 100° beam angle in the flood or mixed mode which is ideal for night running and path finding.

Two smaller red LEDs sit in the centre and provide constant red or red flashing outputs, which preserves your night vision and is good for wildlife observation, astronomy and night photography.

The headband design features a double strap of thin elastic the whole way round instead of a traditional headband which has multiple benefits such as reducing weight, reflective properties, glowing in the dark and an easy adjustment toggle for a perfect fit. Additionally the head torch has a hinged bracket, that is hollowed to reduce weight further, and allows the light to be tilted and adjusted.

Two push buttons are located on top of the NU25 UL, a larger power button and a smaller mode button. The power button turns the light on/off and changes the brightness level. To access the white light hold the power button for one second, and it will turn on in the spot + flood low mixed mode. Each press of the power button will then cycle through low, mid and high in the mixed mode. To change from the mixed mode, press the smaller mode button with the light on to cycle through mix, spot, flood and red. In spot or flood the mode button will change between low or mid, and in red the mode button will change between constant red or flashing red. The flood ultralow brightness level is accessed by double pressing the power button when the light is off.

To directly access the red light, instead use the smaller mode button and hold for one second from off. When the light is on in any mode simply hold either the power button or mode button for one second to turn the light off again. Two special modes of SOS and beacon are also available, and can be accessed in any state with a double press of the mode button, and once accessed the power button will cycle between the two with each press. To exit the special modes simply double press the mode button again to go back to the previous output.

Four battery indicators are built into the top of the torch and will display remaining battery power when the mode button is pressed once while the light is off. All four lights is approx. 100%, three is approx. 75%, two is approx. 50% and one is approx. 25% and the light should be charged as soon as possible. To prevent accidental activation there is also a lockout function which can be done by holding down both buttons for 2 seconds until the white light flashes 3 times. To unlock do the same again and the light will turn on in the ultralow flood white.

The NU25 IL has an integrated 650 mAh lithium-ion battery that is charged via the USB-C charging port on the side of the torch. Reveal the port by lifting the dust cover and then simply plug the included USB-C cable into the charging port and the other end into a suitable USB power source. The charging indicators on the top will flash in turn before becoming solid, and once all four indicators are solid after approx. 1 hour, 25 minutes the charging will be complete.

Product Features

Spot, flood or mixed white light options
Direct access to red light output to preserve night vision
Built-in power indicator reports remaining battery power
Wide angle 100° beam
USB-C rechargeable with included cable
New design lightweight elastic headband

Operational Modes

Mixed High: 400 lumens; 2 hours, 40 minutes run-time; 64 m beam range*
Mixed Mid: 200 lumens; 4 hours, 40 minutes run-time; 45 m beam range
Mixed Low: 60 lumens; 10 hours, 25 minutes run-time; 24 m beam range
Spot Mid: 200 lumens; 4 hours, 15 minutes; 58 m beam range
Spot Low: 60 lumens; 10 hours, 30 minutes run-time; 31 m beam range
Flood Mid: 200 lumens; 4 hours, 15 minutes; 23 m beam range
Flood Low: 60 lumens; 10 hours run-time; 12 m beam range
Flood Ultralow: 6 lumens; 45 hours run-time; 4 m beam range
Red Constant: 10 lumens; 16 hours run-time; 8 m beam range
Red Flash: 10 lumens
SOS: 400 lumens
Beacon: 400 lumens

Note: *Only stays in high mode for 30 seconds before dropping down due to overheat protection, therefore this run-time is not based on constant use at full output. The high can be accessed again after it drops down, but if the NU25 UL becomes overheated it will stay in the lower output until the torch cools.

Tested to ANSI/NEMA FL1 standards with the integrated battery fully charged in laboratory conditions. End user results may vary due to individual usage habits and environmental conditions.

Technical Details

Type: Ultra lightweight LED head torch
Operating Modes: Mixed / Spot / Flood / Red / SOS / Beacon
Luminous Flux: Up to 400 lumens
Lamp Type: 1 x white spot LED / 1 x white flood LED / 2 x red LED
Beam Range: Up to 64 m
Beam angle: 100°
Batteries Required: Built-in 650 mAh lithium-ion rechargeable
Dimensions: 60.1 x 33 x 25.5 mm
Weight: 45 grams
Body Colour: Black
Body Material: Durable polycarbonate materials
Strap: Adjustable elastic straps
Switch Type: Dual push button
Impact Resistance: 1 m
Environmental: Water and dust resistant to IP66 standard
Warranty: 2 years

Packaging and Contents

Supplied in retail packaging and includes:
Nitecore NU25 UL head torch x 1
USB-C to USB-A charging cable x 1