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Fenix ARB-L18U 18650 3500mAh 3.6V Protected Lithium Ion (Li-ion) Button Top Battery with Micro USB Charging Port - Clam Shell

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Fenix ARB-L18-3500U

USB Rechargeable 18650 Li-ion Battery

The Fenix ARB-L18-3500U is a Li-ion 18650 battery with the power and flexibility you need to keep your favorite Fenix flashlights powered up wherever you go. This high capacity energy source is cable of being charged in either a standard charger or directly via USB thanks to a Built-in Micro USB Port! So anywhere you have a desktop, laptop or other USB power source you can charge this powerful battery. The ARB-L18-3500U features a standard 3.6 Volt output as well as high capacity with 3500mAh. The battery is outfitted with a PCB unit that regulates both power and charging, so there is no need to worry about over charging or discharging.

  • PCB Protection Circuit
  • Micro-USB charging port
  • Multiple protection systems
  • Short circuit protection
  • Up to 500 charge cycles
  • Pressure Relief Vent
  • Model: ARB-L18-3500U
  • Size: 18650
  • Capacity: 3500mAh
  • Voltage: 3.6V
  • Terminal Type: Button Top
  • Max Discharge Current: 5.1A
  • Charging Current by Charger: 1A
  • Charging Current by USB Port: 0.8A
  • Weight: 50.2g
  • Dimensions: 18.6mm x 70mm
Battery Size:18650
Battery Capacity (mAh):3500
Battery Chemistry:Li-Ion
Battery Voltage:3.6
Battery Terminal Type:Button Top
Battery Shelf Life:10 Years
Product Certifications:CE, FCC, RoHS
Packaging:Retail Packaging
Warranty:Battery Junction 30-Day Warranty, Fenix 1 Year Warranty
Return Policy:Battery Junction Return Policy
Product Weight:1.764oz
Product Dimensions:2.717" (L) x 0.732" (Diameter)
Country of Origin:China
Associated Battery Sizes:168A, 18650, 19670, Protected 18650, Unprotected 18650
By Bradford
CA Gold Coast
January 29, 2021
Have two. One came with the new Fenix LD30 LED flashlight I bought. I added a second battery as a back up. Both appear to have very high build quality and quickly took a full charge from my Nitecore D2 Digicharger. The primary battery in the LD30 has been running strong so far. No complaints.
By Tony
New Hempstead, NY
Great feature for charging!
February 26, 2020
This makes life that much easier for charging. This is my spare and so far is working well. I will be able to provide better feedback on longevity once I have charged it many times. Appears very well made and I'm sure will be the great quality I expect from Fenix.
By Sailor
West Michigan Lakeshore
Great battery can recharge with micro usb
May 10, 2019
When deployed I can take one in the flashlight and 2 in a carrier for search and rescue after dark. Easy to recharge even in vehicle. LED on battery top let's you know when charge is complete.
By Jake
Oneonta, Alabama
January 19, 2018
Nice, seems well made. But time will tell the truth.
  • Appearance is great.
  • It will take a year or so before I can speak about the quality of this battery.
By Lozie
Oscoda , Michigan
Fenix ARB-18U 18650 3500mAh 3.6V Protected Lithium Ion (Li-ion) Button Top Battery with Micro USB Charging Port-
December 3, 2017
The battery had it first charge until it be came full charge.
  • The USB charge port to charge battery when need with more convince.
  • None.
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Fenix ARB-L18U 18650 3500mAh 3.6V Protected Lithium Ion (Li-ion) Button Top Battery with Micro USB Charging Port - Clam Shell

  • $26.95
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  • In Stock