The Fenix ARB-L21-5000U is a rechargeable 21700 Li-Ion USB battery with a capacity of 5000 mAh and an integrated micro-USB charging port. The Fenix 21700 battery can be quickly charged via the USB port without the need for a separate charger. Alternatively, it can also be charged with an external charger. Like all Fenix Li-Ion batteries, the ARB-L21-5000U is housed in a solid steel tube, significantly reducing the potential risk of short circuits due to collisions or impacts. Additionally, the Fenix ARB-L21-5000U battery is protected against short circuits, overcharging, deep discharging, and overheating.

The high-quality Fenix Li-Ion battery ARB-L21-5000U has been specifically designed for use in high-performance flashlights. With a high capacity of 5000 mAh, excellent performance, and high reliability, the Fenix 21700 battery is the best choice among rechargeable Li-Ion batteries.

Advantages of the Fenix 21700 ARB-L21 5000 mAh battery:

• Original 21700 Fenix battery with 5000 mAh, rechargeable via USB Type-C cable
• Charge status indicator with built-in LED
• Specifically designed for high-performance flashlights
• Integrated protection circuits against short circuits, overcharging, deep discharging, and overheating
• Pressure reliefs to prevent explosions
• High mechanical protection through steel casing
• Button-top design
• High quality and reliability
• Fast charging capability, approximately 500 charge cycles
• No memory effect, very low self-discharge

Technical specifications:

• Model: ARB-L21-5000U
• Battery type: Li-Ion
• Battery shape: 21700
• Capacity: 5000 mAh
• Nominal voltage: 3.6V
• Energy storage: 18Wh
• Maximum discharge current: 8A
• Charging current: USB: 2A, charger: 1A / max. 5A
• USB charging port: Yes, Type-C
• Charge cycles: 500
• Dimensions: 76 mm × ø21.5 mm
• Weight: 72.5 g.