High-performance rechargeable battery
With a high capacity of 4000 mAh, the Fenix ARB-L18-4000U 18650 lithium-ion battery delivers long-lasting power for the most demanding flashlights and devices.
Multiple protections
Its riveted steel casing, gas release vents and integrated electronic protections ensure safe and reliable use.
The battery charges directly via its integrated USB-C port located on the top.
It can also be recharged using chargers such as the Fenix A2/A4/D1/D2, or directly inside a flashlight or device equipped with a compatible charging port.
Technical specifications
Capacity: 4000 mAh
Nominal voltage: 3.6 V
USB-C charging port
Can be recharged directly in a device or with a compatible charger
Protected against short circuits, overcharging and overvoltage
Full charging time: approx. 3.5 hours
Retains 70% of its capacity after 500 cycles
Dimensions: diameter 18.75 mm, length 72 mm
Weight: 55 g