Nitecore i4000R 4400lm review. Is it worth it in 2023?

4 x Cree XP-L2 V6 LEDs
4400 lm output
13300 cd intensity
1 x special 21700 Li-Ion battery

The Nitecore i4000R (I4000R) released in 2019. It uses 4 x Cree XP-L2 V6 LEDs, SMO reflector and 1 x special 21700 Li-Ion battery. The powerful emitter in this flashlight provides up to 4400 lm output, 13300 cd intensity, and a beam distance of 231 m.

The i4000R is a powerful and reliable flashlight. With its impressive illumination capabilities and durable construction, it serves as an exceptional lighting tool for various situations and environments. This light has 5 modes of lighting. Instead of having to cycle through multiple modes to find the desired setting, mode memory of i4000R ensures that the flashlight starts in the mode you prefer or need.

The strobe function of i4000R produces a high-frequency flashing light pattern that is designed to disorient or distract potential threats or aggressors. The flashlight is rechargeable easily via USB port.

Table of contents:

Nitecore i4000R (I4000R) specifications

Rated 3/5 based on 1107 user votes.

The i4000R flashlight enhances safety by illuminating potential hazards and improving visibility in low-light conditions.


Weight135 g
Length159 mm
Head diameter32.6 mm
Materialaluminium alloy with HAIII hard-anodized finish

The 135 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.

Aluminium body of i4000R is known for its durability and strength. It offers excellent resistance to impacts, scratches, and corrosion, making it suitable for rugged outdoor use or in demanding environments. The body of i4000R flashlight treated with a Type III hard-anodized, anti-abrasive finish. The i4000R flashlight is available in black.


Emitter4 x Cree XP-L2 V6 LEDs
Color temperature5000 K
LensAR coated glass
Switchmechanical rear, mode pedal rear

Cree LEDs are commonly used in a wide range of lighting applications. Their products are trusted by lighting professionals and have gained a strong reputation for quality and performance. The choice of color temperature depends on the specific lighting application and personal preferences. With the smooth reflector of the i4000R, the beam tends to have a well-defined hotspot at the center, which provides a concentrated beam of light for long-range applications.

This flashlight has an AR coated lens. This Anti-Reflective coating is a thin optical coating applied to the surface of the lens to minimize reflections and improve light transmission. The multiple switch configuration on the i4000R flashlight can be a useful option, providing additional versatility and convenience in operating the flashlight. The i4000R has mechanical switch. Mechanical switches are known for their durability and reliability. They are typically built with robust construction, making them resistant to wear and tear, and capable of enduring various environmental conditions. The rear switch of i4000R is designed to be rugged and durable, capable of withstanding harsh conditions and repeated use.


Flux4400 lm
Intensity13300 cd
Throw231 m
CD/LM factor3.02

With 4400 lm, the i4000R flashlight will provide an exceptionally bright and powerful beam of light. It can illuminate large areas, outdoor spaces, or even act as a temporary spotlight in certain situations. The i4000R flashlight with 13300 cd has an extended throw distance, allowing you to illuminate objects or areas at greater distances. This can be advantageous for outdoor activities, search and rescue operations, or scenarios where long-range visibility is required.

The throw is the calculated distance in meters at which the flashlight produces a light intensity of 0.25 lux. The cd/lm factor (candela-to-lumen ratio) provides information about how concentrated or focused the light output of a light source is. A higher cd/lm ratio indicates that the light is more concentrated in a specific direction, while a lower ratio indicates a more diffused or spread-out light output.


Modes5 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 i4000R 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. Strobe mode on i4000R flashlight produces a rapid, repeated flashing of light. It can be used for signaling purposes, self-defense, or attracting attention in emergency situations.


Battery1 x special 21700 Li-Ion battery
Battery indicatoryes
Charger portUSB Type-C
Thermal regulationyes

The i4000R flashlight utilizes 1 x special 21700 Li-Ion battery as its power source. The i4000R 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. This flashlight can charge the battery with an integrated charger, and it works with a USB power source.

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 built-in thermal control automatically adjusts brightness output to prevent overheating. The "6" in the IP68 rating represents the level of protection against solid objects, specifically dust and foreign particles. It indicates that the i4000R flashlight, is fully protected against the entry of dust and other solid objects. The "8" in the IP68 rating indicates the highest level of protection against water ingress.


Package contentsCR123 battery magazine
NTH20 tactical holster
USB Type-C cable
spare o-ring
special 21700 battery

With an included battery you can immediately use the flashlight for your desired applications, saving time and allowing you to focus on your tasks or activities. The package includes a holster to safely store your flashlight. When the flashlight is clipped to a suitable location, it can be angled or positioned to provide hands-free illumination. The lanyard of i4000R helps protect the flashlight from accidental damage by preventing it from falling or hitting the ground. Having spare O-rings allows you to replace them as needed, ensuring that the flashlight maintains its water-tight seal and remains protected from moisture or water ingress.

The performance of the Nitecore i4000R 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.

The specifications above 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 i4000R, then don’t hesite and signal the problem to us.

Nitecore i4000R (I4000R) pictures

Nitecore i4000R / I4000R photo
Nitecore i4000R / I4000R photo
Nitecore i4000R / I4000R photo
Nitecore i4000R / I4000R photo
Nitecore i4000R / I4000R photo
Nitecore i4000R / I4000R

Nitecore i4000R (I4000R) comparisons

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