Rechargeable Battery [Fenix]
The Fenix battery model with part number ARB-L18-3500 is in the common 18650 format. These batteries are suitable for most Fenix high-power flashlights as well as other equipment. The type of electrolyte is lithium-ion. Such batteries are characterized by a low percentage of self-discharge, the ability to work effectively in a large temperature range. Also the undeniable advantage of lithium-ion batteries is almost no memory effect. Therefore, they can be charged again without waiting for complete discharge. It is better to store them charged, but not completely.