Ledlenser K4R Rechargeable Keylight – Gold & Grey


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Led Lenser



The Ledlenser K4R Rechargeable Keylight in Gold & Grey represents a blend of compactness as well as powerful illumination. With an output of up to 120 lumens, it surpasses the functionality of most smartphone flashlight features. Its design incorporates a sleek brushed aluminum housing, adding a touch of elegance to its practicality.

Convenience is paramount with the K4R, as it features an integrated fold-out USB-A interface for hassle-free charging. The keychain light comes equipped with a carabiner for easy attachment, ensuring it’s always within reach when needed. Additionally, an integrated battery and charge level indicator offer insights into the remaining power, enhancing usability.

The Ledlenser K4R offers versatile lighting modes to suit different needs. In Boost mode, it delivers a powerful 120-lumen output with a beam distance of 30 meters. Power mode provides a balance between brightness and runtime, offering 80 lumens with a 25-meter beam distance for up to 1 hour. For extended use, Low Power mode offers a 20-lumen output with a beam distance of 10 meters for up to 3.5 hours.

Designed for practicality, the keylight features a transportation lock to prevent unintentional activation, ensuring battery life is preserved. Its compact dimensions, with a length of 52mm and a weight of 20 grams make it an unobtrusive addition to any keychain.

The Ledlenser K4R is powered by a rechargeable Li-ion battery with a capacity of 180mAh, providing reliable performance. With an IP2X rating, it offers protection against dust ingress and is designed to withstand drops from heights of up to 2 meters. Operating within a temperature range of -20Β°C to +40Β°C, it remains functional in various environments.


  • Light Function:
    Boost, Power Low Power
  • Light Values:
    Boost Mode:
    Light output [lm] – 120
    Beam distance [m] – 30
  • Power Mode:
    Light output [lm] – 80
    Beam distance [m] – 25
    Run time [h] – 1
  • Low Power Mode:
    Light output [lm] – 20
    Beam distance [m] – 10
    Run time [h] – 3.5
  • Transportation Lock


  • Length defocused [mm] – 52
  • Head diameter [mm] – 25
  • Tube diameter [mm] – 25
  • Weight incl. batteries [g] – 20
  • Weight without batteries [g] – 15
  • Focus function – No
  • Head material – PC
  • Tube material – Aluminum alloy
  • Optic – Plastic lense (PMMA)
  • Cartridge – No
  • Power source type – Rechargeable battery
  • Battery quantity – 1
  • Battery type – Li-ion
  • Battery replaceable – No
  • Total battery voltage [V] – 3.7
  • Total battery capacity [mAh] – 180
  • Total battery energyΒ² [Wh] – 0.67
  • Rechargeable – Yes
  • Charging time [min] – 180
  • Energy modes – Energy Saving
  • Energy status indicator – Battery Indicator, Charge Indicator
  • IP class – IP2X
  • Drop test (drop height) [m] – 2
  • Working temperature range [Β°C] – -20 to +40

Manufactures website


Led Lenser

LED Lenser is a renowned brand known for its cutting-edge illumination products. It boasts a diverse range of high-performance LED flashlights and headlamps, ensuring exceptional brightness and reliability. With a commitment to quality and innovation, it continually pushes the boundaries of lighting technology. The brand's products feature sleek designs, combining functionality and aesthetics seamlessly. Lenser focuses on user experience, providing ergonomic grips and intuitive controls for easy handling. Its flashlights offer adjustable beam focus, allowing users to switch between a wide floodlight and a focused spotlight effortlessly. LED Lenser employs advanced LED technology, delivering powerful and consistent light output while maximizing energy efficiency. The brand emphasizes longevity, utilizing durable materials and robust construction to ensure its products can withstand the rigors of outdoor adventures and professional use. One of LED Lenser's standout features is its patented Advanced Focus System, enabling seamless transition between floodlight and spotlight modes. This technology enhances versatility, making their products suitable for various applications, such as camping, hiking, and emergency situations. LED Lenser takes pride in its meticulous attention to detail and rigorous quality control processes. Each product undergoes extensive testing to guarantee reliability and performance. The brand's commitment to excellence has earned it a loyal customer base and numerous accolades within the industry. Overall, LED is synonymous with innovation, reliability, and exceptional illumination. Whether you need a compact flashlight for everyday carry or a powerful headlamp for demanding outdoor activities, it offers a comprehensive range of lighting solutions to meet your needs.
Led Lenser