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ARB-L18-3500U Built-in USB Rechargeable Battery

$33.00 $25.95

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ARB-L18-3500U is a high capacity 18650 Li-ion USB rechargeable battery with a built-in micro-USB charging port. It also includes a protection circuit in the anode to help prevent short circuits, over charge/discharge and over heating. These USB rechargeable batteries can quickly be charged without the need for a separate charger. This not only saves you money from purchasing a charger, but also provides the convenience of not having to carry around another device. This will work in all of the current models that utilize a li-ion 18650 battery. A micro-USB charging cord is NOT included.

Click here to see other models that utilize 18650 batteries.

SKU: ARB-L18-3500UN/ABarcode: 6942870304724N/A

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More Information

Specifications of the ARB-L18-3500U Built-in USB Rechargeable Battery

  • Micro-USB charging port
  • 3500mAh high capacity
  • USB rechargeable batteries
  • 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

Customer Reviews

Based on 352 reviews
Joe Trevino

Don’t get anything else other than OEM Fenix batteries. Tried others but performance was less than adequate. Bought original battery and problem solved.

Great battery!

Great long lasting quick to charge battery. Love the charger less style.

Dale Hovey

Works great., longer run time. Upgraded from standard battery

Richie Taito
Very high-quality

As with anything purchased From Fenix lighting, I am extremely satisfied. I am definitely a lifer. Thank you for always standing behind your products and taking care of my family and I!

Jim DiRenzo
Not sure

When I contacted Fenix about my recharging problem I was told that my batteries were bad, so I bought the ARB-L18-3500U battery. Unfortunately that was not my problem. I was then told that my Apple computer was the charging problem. I spoke to another Fenix owner who told me that he used the Apple to charge his flashlight. I then contacted the Fenix warranty dept and was advised to send my flashlight in for repairs. I am waiting for it's return.
Fortunately Tom Moran gave me a SECOND Fenix so that I will have two. Thank you Tom Moran.

We have had issues with some apple bricks not charging lights/batteries fully, so we do generally recommend charging with a different charger.

Kenneth Bunker
Trust this battery

Bought a second as a backup and looked around but nothing seems to match the reliability and safety of the Fenix battery not to mention convenience of the direct USB charging.

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