The Fenix ARB-L21-6000B Rechargeable Powerbank Battery offers a high-capacity 6000mAh energy reserve within a compact 21700 battery format. It supports efficient USB-C charging and not only powers your 21700 battery flashlights but can also serve as a power source for other USB-C devices using only the included USB type C cable. COMPATIBLE WITH Fenix HT18R, HT32, TK17, TK22R, TK30R, WF25RM, LR36R, CL27R, LD45R, PD45R ACE, PD40R V3.0, PD36R V2.0. The list of compatible models may change in the future. Shipping Note: Lithium ion batteries are considered "dangerous goods" per US transportation regulations and can often only be transported via ground shipment. Orders containing loose batteries will typically take much longer than predicted to be delivered. Delivery times of 14+ days are common.