Fenix ARB-L21-5000U Type 21700 high capacity Li-ion 3.6v rechargeable protected battery Quantity:4 The E4K is constructed with

The E4K is constructed with a CNC machined unibody design

which means you are never out of ways to power this handy lantern

Compatible with batteries:

1200 lumen max ultra compact rechargeable flashlight

Fenix ARB-L21-5000U Type 21700 high capacity Li-ion 3.6v rechargeable protected battery Quantity:4 The E4K is constructed withARB L21 5000U type 21700 BatteryARB L21 5000U is a high capacity 21700 Li ion USB rechargeable battery built for more power and longer runtimes. This battery has its own USB C charging port for quick easy charging without the need for a separate charger. Additional features include a protection circuit in the anode to help prevent short circuits, over charge discharge and over heating. Pressure relief vents which expel waste gas in the rare case of an