Fenix ARB-L21-4000 mAh is a high-quality lithium-ion battery of 21700 type with a standard capacity of 4000 mAh, designed for hunting and tactical flashlights and devices with high current consumption.
Thanks to its advanced design and multi-level protection, the manufacturer guarantees up to 500 charging cycles with up to 75% capacity. This means that the cell can be discharged and recharged daily over a period of 1.5 years - which clearly emphasizes its quality and performance.
The ARB-L21P battery is characterized by a high discharge current of up to 10 A (pulsed discharge current of up to 18 A), high energy and voltage density, so it can be used to power flashlights with increased energy requirements.
Due to the lack of memory effect, Fenix batteries can be recharged at any time without adversely affecting their capacity and service life.
The steel body provides high mechanical strength and minimizes the risk of short-circuiting caused by a fall or impact. The battery uses pressurized vents, responsible for expelling gas, which can lead to a bloat or explosion during an incidental short circuit.
The manufacturer has used a multi-level safety system that maximizes the life and ensures the highest level of safety of the battery.
Safety systems:
- protection against over-discharge during use
- protection against overcharging during the charging process
- circuit protection against short circuits
- protection against overheating
- cathode with PTC protection (overload protection).
To maximize the life of the battery, a current of 1 A is recommended for charging, with a maximum of 4 A.
