Fenix ARB-L21-5000U is a  High Capacity 21700, 5000mAh USB-C rechargeable Lithium - ion battery specifically designed for high intensity flashlight use and is the perfect companion for Fenix 21700 powered lights.

• Fenix ARB-L21-5000U battery features:
• High capacity (5000mAh), great reliability and compact design
• 8A maximum output current
• USB-C fast charging port built in to battery
• 1A recommended charging current. 5A maximum (Charges up to 2A max via USB port)
• Protection circuit built into negative terminal for outstanding damage resistance
• Triple overheat protection for safety and reliability
• Built-in overcharge and over discharge protection
• Unique structural design for better impact resistance
• Button top positive contact for greater versatility
• Dia 21.5mm, Length 76mm