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Fenix ARB-L18-3500U USB Rechargeable 18650 Battery


Fenix’s largest and strongest battery has just been upgraded! The Fenix ARB-L18-3500U USB rechargeable lithium-ion battery is now available!

Availability: 1 in stock

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SKU: WESARBL183500 Categories: , Tag:

Product Description

Fenix ARB-L18-3500U USB Rechargeable 18650 Battery

The Fenix ARB-L18-3500 is a high-capacity 18650 Li-ion rechargeable battery featuring an anode protection circuit to protect against short circuits, overcharging/discharging, and overheating. Pressure relief vents are also included in the battery, which expel waste gas in the unlikely case of an internal short circuit, avoiding an explosion.


  • Fenix ARB-L18-3500U mAh USB Rechargeable 18650 Battery
  • Micro USB charging port lets you charge the battery directly
  • Button-Top Design
  • Protection circuit built in the anode with a riveted steel hat. Riveted steel shell eliminates the risk of short circuit caused by collision and impact.
  • Pressure Relief Vent: Expels waste gas generated by internal short circuit. Expelling waste gas prevents a cell from inflating or exploding.
  • Three Sets of Over-Heat Protection:  Overcharge protection, Over-discharge protection, Short-circuit protection, and overheating protection
  • 500 Charge Cycles: A properly maintained ARBL18 battery is designed to retain up to 75% of its original capacity at 500 full charge and discharge cycles.
  NOTE: USB Cable NOT Included

Tech Specs

  • Capacity: 3500mAh
  • Voltage: 3.6V
  • Charging Current: Recommended 1A, maximum 2A
  • Weight: 50g
  • Size: Length: 2.7″ (69mm) Diameter: 0.7″ (18.6mm)
  • Warranty Period: 12 month from date of purchase