Fenix ​​18650 rechargeable battery, 4000 mAh

The top-of-the-line Fenix ​​18650 4000 mAh rechargeable batteries with their own USB-C charging connector (ARB-L18-4000U) and protected electronics deliver the highest real capacity on the market. Li-ion rechargeable batteries are characterized by a very high capacity, they do not suffer from memory effect or self-discharge. Li-ion in the 18650 size are the best choice in terms of stored energy in relation to the dimensions and weight of the battery.

The battery can be charged by connecting the cable to the integrated USB-C connector (e.g. from a computer or mobile phone charger), but also in a flashlight equipped with a USB connector or in a charger that can accommodate Li-ion batteries with a length of 72 millimeters.

Please note that this battery is approximately 72 millimeters long due to the added USB-C charging connector, making it significantly longer than regular 18650 Li-ion batteries. So it only fits into some lamps, headlamps and chargers. We have verified compatibility in these Fenix ​​lamps and headlamps: PD32R, E28R V2.0, LD30R, TK11 TAC, TK11R, TK26R, TK35 UE V2.0, TK35R, CL26R, CL30R, HM62-T, HM65R-T V2.0, HM75R, HM61R, HM61R V2.0.

Fenix ​​battery protection consists of internal safety mechanisms and protective electronics. Added electronic circuits prevent the cell from being overcharged, over-discharged, short-circuited, or drawing too much current. If the battery electronics evaluates reaching the limit values, it safely disconnects the cell.

Internal protection consists of a separator, protection against overheating (PTC thermal protection) and a special anti-explosion valve. If the gas pressure in the cell exceeds a certain limit, the internal separator separates the electrodes inside the battery, de facto interrupting the exothermic reaction, and the anti-explosion valve releases the excess gas pressure outside the battery. Thanks to the combination of electronic and mechanical (temperature and pressure) protection, the Fenix ​​battery is one of the safest Li-ion batteries available.

Parameters of the Fenix ​​18650 4000 mAh USB-C battery

• Nominal voltage: 3.6 V
• Capacity: 4000mAh
• Maximum current consumption: 7 A
• Maximum charging current: 4 A
• Dimensions: 18.75 mm (diameter) x 72 mm (length) (+/- 0.5mm)
• Weight: 50 grams
• Protection against overcharge, deep discharge and short circuit (>7 A). Protective circuit attached to the positive pole.
• Lifetime of more than 500 charging cycles
• Recommended operating temperatures: 0-45°C (charging), -20 to +60°C (discharging)
• Scope of delivery: one Fenix ​​18650 4000mAh battery (ARB-L18-4000U).

Charging via USB-C connector

Plug the USB cable into the side USB-C connector; the indicator light on the top of the battery will glow red while charging. It lights up blue when fully charged. When using a USB source with a current of 1500 mA or higher, the charging time is approximately 2.5 hours.

Recommended chargers

Charger Fenix ​​ARE-A2
Charger Fenix ​​ARE-A4
Fenix ​​ARE-D1 USB charger
Fenix ​​ARE-D2 USB charger
Eight-channel USB charger VC8S
SkyRC MC3000

Warning

• The battery is approximately 72 mm long, check first if it will fit in your device!
• If possible, do not discharge the battery below 2.5 V.
• Do not short-circuit the battery (do not connect the poles of the cell with a wire).
• Do not throw the battery into fire or water.
• Never insert the battery into the charger upside down (opposite polarities).
• When using the accumulator, pay attention to the safety principles.
• Use only an adequate charger supporting Li-ion batteries.

Warranty

Warranty two years.

Capacity: 4000mAh
Weight: 50g