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18650 rechargeable li-ion batteries
ARB-L18-3500 multiple protection
ARB-L18-3500 pressure relief
battery protection circuit
All Batteries have 500 charge cycles
fenix arb-l18-4000 rechargeable battery
fenix arb-l18-4000u rechargeable battery
Fenix 18650 Rechargeable Batteries

Fenix 18650 Rechargeable Batteries

from $9.95

Shipping calculated at checkout.

Battery Variation: ARB-L18-2600

  • ARB-L18-2600
  • ARB-L18-2600U
  • ARB-L18-3000P
  • ARB-L18-3400
  • ARB-L18-3400U
  • ARB-L18-3500
  • ARB-L18-3500U
  • ARB-L18-4000
  • ARB-L18-4000U
$9.95
Out of stock

18650 rechargeable batteries are high-capacity batteries used in lighting products. The 18650 battery is a great alternative for products that utilize 2xCR123A disposable batteries. Not only are you being environmentally friendly by eliminating disposable batteries, but the 18650 battery also provides different levels of capacity for your exact need and is rechargeable. For example, you can get 30% more capacity out of a ARB-L18-3500 compared to a ARB-L18-2600. In addition, Fenix batteries are built with safety in mind. There are built in features to prevent short circuits, design multiple layers of protection and the new button-top design.

The high capacity 18650 Li-ion rechargeable batteries each provide protection circuits in the anode to help prevent short circuits, over charge/discharge and over heating. Each 18650 battery also includes pressure relief vents which expel waste gas in the rare case of an internal short circuit preventing an explosion. Fenix’s 18650 batteries have a guaranteed lifespan of 500 charge cycles. This means that the battery will recharge to at least 75% of its original battery capacity 500 times over. Compared to single-use batteries, rechargeable batteries are both cost-efficient and more useful for the consumer, offering extended runtimes and capacity on a single charge. Not only that, they are also beneficial to the environment by limiting the amount of single-use products and discarded chemicals. Overall, Fenix’s 18650 batteries offer a safe, time and cost-effective solution for anyone looking to power their high-lumen flashlights. Always make sure to purchase li-ion batteries from an established and trusted distributor to avoid purchasing faulty, potentially dangerous products.

The USB versions will work in all of the current models that utilize a li-ion 18650 battery—in older Fenix lights these may not work. A micro-USB charging cord is NOT included with the USB versions. See our wide range of products that accommodate the 18650 batteries: 18650 Fenix Products

* Please note that the ARB-L18-4000U battery is not compatible with the following lights: PD32 V2.0, PD35 V3.0, TK35UE V2.0, HM60R, HM61R V2.0, BC30 V2.0

SKU: ARB-L18-2600-WEBN/ABarcode: 6942870303499N/A
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Counterfeit Warning

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More Information

ARB-L18-2600 – 18650 Battery, Rechargeable

  • 2600mAh high capacity
  • Protection circuitry to prevent short circuits
  • Pressure vents to prevent explosions
  • 500 charge cycles guaranteed before 75% decrease by memory effect
  • Voltage: 3.6V
  • Charging Current: Recommended 1A, maximum 2A
  • Weight: 1.8 ounces (50g)
  • Size: Length: 2.7″ (69mm) Diameter: 0.7″ (18.6mm)
  • Warranty Period: 12 month from date of purchase

ARB-L18-2600U – 18650 Battery, Rechargeable

  • Micro-USB charging port
  • 2600mAh high capacity
  • Protection circuitry to prevent short circuits
  • Pressure vents to prevent explosions
  • 500 charge cycles guaranteed before 75% decrease by memory effect
  • Voltage: 3.6V
  • Charging Current: Recommended 1A, maximum 2A
  • Charging Current USB Port: 1A
  • Weight: 1.8 ounces (50g)
  • Size: Length: 2.8″ (70mm) Diameter: 0.7″ (18.6mm)
  • Warranty Period: 12 month from date of purchase
  • Indicator light on battery is red while charging, blue when charged

ARB-L18-3000P – 18650 Battery, Rechargeable

  • 3000mAh high capacity
  • Large current output up to 14A
  • Protection circuitry to prevent short circuits
  • Pressure vents to prevent explosions
  • 500 charge cycles
  • Voltage: 3.6V
  • Charging Current: Recommended 1.5A, maximum 3.9A
  • Maximum output current: 14A
  • Weight: 1.69 ounces (48g)
  • Size: Length: 2.72″ (69.1mm) Diameter: 0.73″ (18.7mm)
  • Warranty Period: 12 month from date of purchase

ARB-L18-3400 – 18650 Battery, Rechargeable

  • 3400mAh high capacity
  • Protection circuitry to prevent short circuits
  • Pressure vents to prevent explosions
  • 500 charge cycles guaranteed before 75% decrease by memory effect
  • Voltage: 3.6V
  • Charging Current: Recommended 1A, maximum 2A
  • Weight: 1.8 ounces (50g)
  • Size: Length: 2.7″ (69mm) Diameter: 0.7″ (18.6mm)
  • Warranty Period: 12 month from date of purchase

ARB-L18-3500 – 18650 Battery, Rechargeable

  • 3500mAh high capacity
  • Protection circuitry to prevent short circuits
  • Pressure vents to prevent explosions
  • 500 charge cycles guaranteed before 75% decrease by memory effect
  • Voltage: 3.6V
  • Charging Current: Recommended 1A, maximum 2A
  • Weight: 1.8 ounces (50g)
  • Size: Length: 2.7″ (69mm) Diameter: 0.7″ (18.6mm)
  • Warranty Period: 12 month from date of purchase

ARB-L18-3500U – 18650 Battery, Rechargeable

  • Micro-USB charging port
  • 3500mAh 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
  • Charging Current USB Port: 0.8A
  • Weight: 1.8 ounces (50.2g)
  • Size: Length: 2.8″ (70mm) Diameter: 0.7″ (18.6mm)
  • Warranty Period: 12 month from date of purchase
  • Indicator light on battery is red while charging, blue when charged

ARB-L18-4000 – 18650 Battery, Rechargeable

  • 4000mAh high capacity
  • Protection circuitry to prevent short circuits
  • Pressure vents to prevent explosions
  • 500 charge cycles guaranteed before 75% decrease by memory effect
  • Voltage: 3.6V
  • Charging Current: 2A recommended, 4A maximum
  • Max Output Current: 7A
  • Weight: 1.94 ounces (55g)
  • Size: Length: 2.72" (69.2mm) Diameter: 0.74" (18.75mm)
  • Warranty Period: 12 month from date of purchase

ARB-L18-4000U – 18650 Battery, Rechargeable

  • USB Type-C charging port
  • Protection circuitry to prevent short circuits
  • Pressure vents to prevent explosions
  • 500 charge cycles
  • Capacity: 4000mAh
  • Voltage: 3.6V
  • Charging Current: by charger: 800mA recommended, 4A maximum -- by USB-C port: 1.5A
  • Max Output Current: 7A
  • Weight: 1.94 ounces (55g)
  • Size: Length: 2.83" (72mm) Diameter: 0.74" (18.75mm)
  • Warranty Period: 12 month from date of purchase
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