Fenix ARB-L18-3400 Rechargeable 18650 Battery – 3.6V


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Fenix ARB-L18-3400 Rechargeable 18650 Battery – 3.6V

Introducing the Fenix ARB-L18-3400 Rechargeable 18650 Battery – 3.6V. The Fenix ARB-L18-3400 Rechargeable 18650 Battery is a high-performance power source designed to meet the demands of Fenix flashlights and other compatible devices. With a voltage of 3.6V, this rechargeable lithium-ion battery provides reliable and consistent power for various applications.

Key specifications of the ARB-L18-3400 battery include a charging current recommendation of 1A, with a maximum charging current of 2A. This flexibility in charging allows users to choose an optimal charging speed based on their preferences and charging equipment. The battery’s weight is approximately 1.8 ounces (50g), ensuring a lightweight yet powerful energy solution.

In terms of physical dimensions, the ARB-L18-3400 has a length of 2.7 inches (69mm) and a diameter of 0.7 inches (18.6mm). This standard 18650 size makes it compatible with a wide range of devices designed to accommodate this battery format.

One of the stand-out features of the ARB-L18-3400 is its impressive, 3400mAh high capacity. This high energy density allows for extended usage times between charges, making it particularly suitable for power-hungry devices, such as high-performance flashlights.

To ensure the safety and longevity of the battery, Fenix has incorporated protection circuitry in the anode. This circuitry serves to prevent short circuits, overcharging, over-discharging, and overheating. By implementing these protective measures, Fenix enhances the overall safety and reliability of the battery during use.

The ARB-L18-3400 is also equipped with pressure relief vents designed to expel waste gas in the rare event of an internal short circuit. This additional safety feature helps prevent the build-up of internal pressure, reducing the risk of explosions.

With a rated lifespan of 500 charge cycles, the ARB-L18-3400 offers long-term durability and cost-effectiveness. This means that users can recharge the battery approximately 500 times before experiencing a notable decrease in performance, contributing to its overall value.

Features of the Fenix ARB-L18-3400 Rechargeable 18650 Battery:

  • Arb-l18-3400 rechargeable battery
  • 3400mah high capacity
  • Protection circuitry to prevent short circuits
  • Pressure vents to prevent explosions
  • 500 charge cycles


Voltage 3.6V
Charging Current Recommended 1A, maximum 2A
Weight 1.8 ounces (50g)
Length 2.7 (69mm)
Diameter 0.7 (18.6mm)

Check out our other Fenix Flashlights

Manufacturer website.



Fenix is a reputable brand renowned for its exceptional flashlights. They specialize in producing high-quality and reliable lighting solutions for various applications. Their flashlights are known for their durability, brightness, and innovative features. With a wide range of models available, including compact EDC lights, tactical flashlights, and outdoor adventure lights, Fenix caters to different needs and preferences. Their flashlights utilize advanced LED technology, providing bright and efficient illumination. They also prioritizes user convenience by incorporating user-friendly interfaces, adjustable brightness settings, and durable construction. Whether for everyday carry, camping, or emergency situations, Fenix flashlights offer dependable performance and long-lasting battery life. With their commitment to quality and innovation, The company earned a strong reputation among flashlight enthusiasts and professionals alike.