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Fenix ARB-L18-3500U 18650 3500mAh 3.6V Protected Lithium Ion (Li-ion) Button Top Battery with Micro USB Charging Port

11 reviews
Save $3.72
Original price $41.44
Current price $37.72


The most popular Fenix battery just got upgraded! Please welcome the Fenix ARB-L18-3500U USB rechargeable li-ion battery! The ARB-L18-3500U battery can be charged by its own USB port and by the charger as well. A protective circuit is built into the anode and covered with a riveted steel hat. The battery is fully covered with the steel shell, thus the potential risk of short circuiting caused by collision or impact is hugely eliminated!!



  • Micro USB charging port lets you charge the battery directly or in a charger
  • Protection circuit in the Anode to prevent short circuit
  • Multiple layers of protection
  • 500 charge cycles can be expected from a properly maintained battery.
  • Fully covered with a riveted steel shell for impact resistance
  • Over charge, discharge, short circuit, and over heating protection
Customer Reviews
4.3 Based on 11 Reviews
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Satisfied customer

Quick delivery, love the USB Charging feature. Great product for an awesome flash light.

Glen M.
Canada Canada
Derek K.

its perfect for my husbands flashlight at work if the battery goes dead he can charge just the battery does not need a separate charger

Jennifer M.

Was able to locate the perfect battery for my new Fenix flashlight. Having the USB charger on the battery itself, avoided unnecessary need for a charger. Service, shipment was fast.

Shawna D.

Some form of dust cover on the USB port would make having a charged spare battery more handy. Otherwise good so far.

James B.