Phoenix | ARB-L21-5000U | Battery 21700 | 5000mAh | USB-C Port

🔋 Powerful 21700 Li-ion battery with integrated USB-C charging capability

The Fenix ​​ARB-L21-5000U is a 21700 Li-ion battery with a capacity of 5000 mAh, designed for maximum battery life in flashlights that support this size. Thanks to the integrated USB-C port you charge the battery directly without a separate charger. The handy charging indicator light shows at a glance whether the battery is fully charged.

Of twice the capacity as a standard 18650 battery (2300 mAh), this battery offers long-lasting performance and is equipped with protection against overcharging and overheating.

💡 Tip: Li-ion batteries last longer when you charge and use them regularly.

✅ Key benefits

• ⚡ 5000 mAh capacity – extra long burn time for 21700-compatible flashlights
• 🔌 USB-C charging port – direct charging without an external charger
• 💡 Charging indicator – always a view of the charging status
• 🛡 Secured – against overloading and overheating
• 🔄 Up to 500 charging cycles – sustainable and cost-efficient

📋 Specifications

• Type: Li-ion 21700
• Capacity: 5000 mAh
• Nominal voltage: 3.6 V
• Number of charging cycles: ± 500
• Security: Yes (overloaded) & overheating)
• Battery size: 21700
• Button-top: Yes
• Rechargeable: Yes (USB-C)
• Weight: 72 g
• Colour: Orange/Black
• Warranty: 2 years
• Country of origin: China

🎯 Perfect for

Trail runners, outdoor enthusiasts, and professionals who a 21700-compatible flashlight use and attach value to long battery life, instant charging and ease of use.