Fenix ARB-L18-3500U Battery

The ARB-L18-3500U is a high-capacity 18650 lithium-ion rechargeable battery featuring a built-in micro-USB charging port, allowing for direct charging without the need for a separate battery charger. With a robust 3500mAh capacity, this battery offers long-lasting performance and is compatible with all devices utilizing standard 18650 Li-ion cells.

Equipped with advanced protection circuitry in the anode, it safeguards against short circuits, overcharging, over-discharging, and overheating. Designed with pressure relief vents, it also ensures added safety by reducing the risk of explosion in extreme situations. Its user-friendly design, including an LED indicator (red during charging, blue when fully charged), adds convenience and ease of use. Whether you're replacing batteries or upgrading, the ARB-L18-3500U offers efficient power and the benefit of USB recharging—ideal for travel, fieldwork, or daily use.

Features:

• Built-in micro-USB charging port for direct charging
• High 3500mAh capacity for extended runtime
• Rechargeable via USB—no external charger required
• Integrated protection circuit prevents:

  • Short circuits

  • Overcharging

  • Over-discharging

  • Overheating

• Pressure vents for added safety and explosion prevention
• LED charge indicator (red while charging, blue when fully charged)
• Compatible with all devices that use 18650 Li-ion batteries
• Up to 500 charge cycles

Specifications:

• Battery Type: 18650 Li-ion
• Capacity: 3500mAh
• Voltage: 3.6V
• Standard Charging Current: 1A (Recommended)
• Max Charging Current: 2A
• USB Port Charging Current: 0.8A
• Weight: 1.8 oz (50.2g)
• Dimensions:

• • Length: 2.8 (70mm)

  • Diameter: 0.7 (18.6mm)

• Charging Cable: Micro-USB cable not included