Fenix ARB-L18-3500U Battery

Fenix ARB-L18-3500U Battery

Power up your adventures with the ARB-L18-3500U, your ultimate on-the-go rechargeable solution. This high-capacity 18650 lithium-ion battery does away with bulky external chargers by integrating a micro-USB port right into its sleek shell. Plug into any USB outlet—laptop, power bank, car adapter or solar panel—and rejuvenate your battery wherever you roam. With a mighty 3500 mAh capacity, it fuels high-drain gear like flashlights, vaporizers, cameras and headlamps for hours on end, so you can chase sunsets, capture every moment and light your way without interruption.

Designed to endure up to 500 full charge cycles, the ARB-L18-3500U blends longevity with top-tier safety. Its built-in protection circuit automatically guards against short circuits, overcharging, over-discharging and overheating—giving you total peace of mind. Precision pressure-relief vents dissipate heat and reduce the risk of cell deformation or explosion under extreme conditions. Whether you’re mapping remote trails at dawn or tackling a late-night job site, this battery stands ready to perform.

A handy LED indicator keeps you in the know: glow red while charging, then switch to blue when fully charged and raring to go. At just 2.8″ long, 0.7″ in diameter and 1.8 ounces, it slips effortlessly into pockets, packs and multi-battery cases without adding bulk. Its rugged metal casing resists everyday knocks and jolts, making it ideal for urban commutes, weekend hikes and professional fieldwork alike.

Universal compatibility means the ARB-L18-3500U slides seamlessly into any device built for standard 18650 cells. Stash extras in your glove box for emergencies, keep spares in your backpack for extended trips or integrate them into inspection cameras, surveying tools and more. The recommended 1 A charging current optimizes battery health, while the 2 A maximum input gives you a rapid top-up when time is tight. And because it recharges via USB, you can tap into virtually any power source you already carry.

Upgrade your power arsenal with the ARB-L18-3500U and discover the freedom of plug-and-play charging, industry-leading safety features and remarkable capacity—all in one compact cylinder. For adventurers, professionals and everyday tech users alike, this rechargeable powerhouse redefines convenience and reliability, wherever your journey leads.

Key Features and Specifications

• Built-in micro-USB port: charge anywhere with standard USB cables
• 3500 mAh capacity: delivers extended runtime for high-drain devices
• Universal 18650 fit: compatible with flashlights, vaporizers, cameras and more
• Advanced protection circuit: shields against short-circuit, overcharge, over-discharge and overheating
• Precision pressure vents: extra layer of explosion and heat protection
• LED status indicator: red while charging, blue when fully charged
• Up to 500 recharge cycles: long-lasting performance you can trust
• 3.6 V nominal voltage: stable, consistent power delivery
• Flexible charging currents: 1 A recommended, 2 A max for rapid top-ups
• Compact & lightweight: 70 mm × 18.6 mm; 50.2 g
• Robust metal casing: built to withstand everyday wear and tear
• Micro-USB cable compatible (not included): use existing cables for added convenience

Please check out other Fenix products.

Warranty

Our products are covered by a manufacturer’s warranty ranging from 6 months up to a lifetime, subject to the specific item. For detailed warranty information, kindly enquire with our support team.

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