Nitecore NU40 1000lm In-depth review, Pros and Cons

2 x unspecified White LED, 1 x unspecified Red LED
1000 lm output
2700 cd intensity
integrated 2600mAh Li-Ion battery

The Nitecore NU40 (NU40) released in 2023. It uses 2 x unspecified White LED, 1 x unspecified Red LED, TIR reflector and integrated 2600mAh Li-Ion battery. The powerful emitter in this headlamp provides up to 1000 lm output, 2700 cd intensity, and a beam distance of 104 m.

The NU40 headlamp provides hands-free lighting. By wearing this headlamp on your head or helmet, you can direct the light wherever you look, leaving your hands free to perform tasks or activities. TIR lens plays a significant role in shaping the beam pattern of the NU40 flashlight. This light has 5 + 2 modes of lighting. With mode memory, when you turn off the NU40 and then turn it back on again, it will automatically activate the mode that was last used before it was turned off. This USB rechargeable flashlight has become a popular choice for both everyday use and demanding situations where reliable lighting is essential.

Nitecore NU40 (NU40) pictures

Nitecore NU40 / NU40 photo
Nitecore NU40 / NU40 photo
Nitecore NU40 / NU40 photo
Nitecore NU40 / NU40 photo
Nitecore NU40 / NU40

The specifications below are based on the official data published by the manufacturer, but we also take user reviews into consideration. If you found an error or something lacking in the specifications above for the Nitecore NU40, then don’t hesite and signal the problem to us.

Nitecore NU40 (NU40) specifications

Rated 3/5 based on 218 user votes.

Headlamps are versatile lighting tools that provide convenience, hands-free operation, and illumination in a wide range of activities and environments. Whether you're exploring the great outdoors or working on projects in low-light conditions, a headlamp can be a valuable accessory to have.


Weight116 g
Length79.8 mm
Body diameter46.1 mm
Head diameter43.9 mm
Dimensions79.8 x 46.1 x 43.9 mm

The 116 g flashlight is generally comfortable to hold for extended periods and easy to carry in pockets or bags. They are suitable for various applications such as camping, hiking, or emergency situations. A 120-gram flashlight strikes a good balance between functionality, convenience, and weight. The ideal length of a flashlight depends on personal preference, intended use, and the specific features and functionality you're looking for. This flashlight comes in a sleek black color option.


Emitter2 x unspecified White LED, 1 x unspecified Red LED
Color temperature6500 K
Switchdual electronic side

The choice of color temperature depends on the specific lighting application and personal preferences. The TIR lens of NU40 consists of a single-piece lens made of a transparent material, typically acrylic or polycarbonate. Its shape and internal geometry are designed to achieve specific light distribution patterns, such as flood or spot beams, by manipulating the behavior of light rays. The NU40 has electronic switch. Some flashlights with electronic switches have programmable features that allow users to customize the behavior of the flashlight. This may include setting specific modes, configuring brightness levels, or enabling unique functions according to individual preferences.


Flux1000 lm
Intensity2700 cd
Throw104 m
CD/LM factor2.7

The 1000 lm output of NU40 provides greater versatility, as you can adjust the brightness levels to suit different lighting needs. With 2700 cd, the NU40 flashlight provides a noticeably brighter and more intense beam of light. It can illuminate objects or areas with greater clarity and visibility, even at longer distances. The throw distance refers to the maximum distance at which the flashlight can effectively illuminate an object or target. The stated throw distance typically indicates the point at which the brightness falls below a specified threshold, such as 0.25 lux. The candela per lumen (cd/lm) ratio can be used to determine if a flashlight has a spot or flood type beam. Well-focused spot beams can be over 100 cd/lm, tactical flashlights are typically between 20-100 cd/lm, and work lights are less than 10 cd/lm.


Modes5 + 2 modes
Mode memoryyes
Ramping modeno

Modes on a flashlight refer to different output settings or levels of brightness that can be selected to suit different needs and preferences. The NU40 has mode memory. Mode memory means that the flashlight will remember the mode you were using when the light was last turned off, and when you turn it on again. SOS mode of the NU40 produces a specific sequence of long and short flashes to signal distress or emergency situations. It is commonly used in outdoor adventures or survival scenarios.


Batteryintegrated 2600mAh Li-Ion battery
Battery indicatoryes
Charger portUSB Type-C
Thermal regulationyes
Impact resistance2 m
Specialsproximity sensor
red light
white light

The NU40 flashlight utilizes integrated 2600mAh Li-Ion battery as its power source. The NU40 has a battery indicator. A battery indicator is a feature that provides information about the remaining power level of the flashlight's battery. It helps users monitor the battery status and estimate how much runtime they have left before the battery needs to be recharged or replaced. The NU40 flashlight can be charged directly from a USB power source, such as a wall adapter, computer, power bank, or car charger. This allows for convenient and versatile charging options, as you can utilize various USB power sources to recharge the flashlight's internal battery.

LVP (Low Voltage Protection) is designed to protect the battery from being over-discharged, which can lead to reduced battery life or even permanent damage. The NU40 has thermal protection feature. The thermal protection mechanisms are designed to monitor and regulate the temperature of the flashlight during operation. This feature helps prevent overheating, which can be detrimental to the flashlight's performance, battery, and overall safety.

The "6" in the IP68 rating represents the level of protection against solid objects, specifically dust and foreign particles. It indicates that the NU40 flashlight, is fully protected against the entry of dust and other solid objects. The NU40 flashlight with IP68 rating can withstand being submerged in water beyond 1 meter for a prolonged period, typically specified by the manufacturer. It is important to consider the impact resistance rating when selecting a flashlight, especially if you anticipate using it in situations where accidental drops or impacts are likely to occur.


Package contentsUSB Type-C cable

The performance of the Nitecore NU40 flashlight is measured according to the ANSI / NEMA FL1 Standard 30 seconds after switching the light on. The ANSI/NEMA FL1 2009 Standard is a set of flashlight performance guidelines.

Nitecore NU40 (NU40) comparisons

According to our statistics, the Nitecore NU40 flashlight was most often compared on our site with the following flashlights.

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