Fenix ​​USB Battery ARB-L21U (21700 5000 mAh 3.6 V)

The Fenix ​​ARB L21 5000U is a 21700 lithium-ion battery with a 5000 mAh capacity and a built-in USB-C port for direct charging. Its advanced design with multiple protections delivers up to 500 charge cycles with approximately 75% remaining capacity. No memory effect, allowing for intermediate charging without loss of capacity or lifespan. The steel casing and pressure valves provide additional protection against short circuits and mechanical damage. The recommended charging current is 1 A, with a maximum of 5 A for optimal performance.