The biggest and baddest Fenix battery just got upgraded! Please welcome the Fenix Fenix ARB-L18-3500U USB rechargeable lithium-ion battery! The ARB-L18-3500U battery can be charged by its built-in USB port or by an external battery 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!

Fenix ARB-L18-3500U USB Rechargeable 18650 Specifications

• 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.

**USB Cable NOT Included**

• One ARB-L18-3500U Micro USB Rechargeable 18650 Battery

***Batteries purchased without any equipment they can operate must be shipped with ground shipping. If you purchase only batteries and no flashlights/headlamps you must select UPS/Fedex Ground unless your order meets the free shipping threshold.***