The Fenix ARB-L21-6000 is a premium 21700 rechargeable Li-ion battery engineered to provide exceptional capacity, dependable performance, and long-lasting power for compatible Fenix flashlights and other devices designed for protected 21700 batteries. Featuring a massive 6000mAh capacity, it delivers extended runtimes, making it ideal for high-performance lighting, outdoor adventures, professional use, and emergency preparedness.

Designed with multiple protection circuits, the ARB-L21-6000 offers enhanced safety by helping protect against overcharging, over-discharging, short circuits, and overcurrent. This advanced protection system ensures reliable operation while helping to maximise the battery’s lifespan.

Built with environmental responsibility in mind, the battery contains no mercury or lead, reducing its environmental impact while maintaining the high standards of performance expected from Fenix rechargeable batteries.

The ARB-L21-6000 is engineered for durability and long-term value. After 500 full charge and discharge cycles, it retains up to 75% of its original capacity, providing years of dependable rechargeable power and reducing the need for frequent battery replacements.

Whether you’re powering a high-output flashlight, tactical equipment, or other compatible 21700-powered devices, the Fenix ARB-L21-6000 delivers reliable, high-capacity performance you can count on.

Key Features

• Premium rechargeable 21700 Li-ion battery
• High-capacity 6000mAh power
• Delivers extended runtimes for compatible devices
• Multiple built-in protection circuits
• Protection against overcharging
• Protection against over-discharging
• Short-circuit protection
• Overcurrent protection
• Stable and reliable power output
• Retains up to 75% capacity after 500 charge cycles
• Long service life
• Mercury-free and lead-free construction
• Environmentally friendly design
• Ideal for compatible Fenix flashlights and other protected 21700-powered devices
• Manufactured to Fenix’s high-quality standards

Specifications