Fenix ARB-L18-3500U USB Rechargeable Li-ion 18650 Battery

The Fenix ARB‑L18‑3500 is a high-capacity 18650 rechargeable Li‑ion battery, offering 3,500 mAh within a standard size that fits most high-performance flashlights. Built for safety and durability, it includes a button-top design, integrated protection circuitry against overcharge, over-discharge, short-circuit, and overheating, plus pressure relief vents to prevent buildup and reduce risk of swelling or rupture. A robust steel-infused anode structure further improves impact resistance and electrical safety. This cell is rated for up to 500 charge cycles, maintaining around 75% capacity afterward, and carries Fenix’s 12-month warranty. Key Specifications: Capacity & Voltage: 3,500 mAh, 3.6 V Protection Features: Overcharge, over-discharge, short-circuit, overheat protection; pressure relief vents; reinforced steel anode Design: Button-top, compatible with Fenix and other 18650 devices Durability: Up to 500 charge cycles, retains ~75% capacity over time Size & Weight: Approx. 69