Rechargeable battery Fenix 18650 4000 mAh (Li-Ion)

Fenix 18650 4000 mAh (ARB-L18-4000) premium rechargeable batteries with protective electronics (protected) deliver the highest real-world capacity on the market. Li-ion rechargeable batteries are characterized by very high capacity, do not suffer from memory effect or self-discharge. Li-ion in the 18650 size are the best choice in terms of stored energy due to the size and weight of the battery.

The protection of Fenix batteries consists of internal safety mechanisms and protective electronics. Added electronic circuits prevent the cell from overcharging, over-discharging and against short circuits or too high current draw. If the battery electronics evaluate that the limit values have been reached, they safely disconnect the cell.

The internal protection consists of a separator, overheating protection (PTC thermal protection) and a special explosion-proof valve. If the gas pressure in the cell exceeds a certain limit, the internal separator separates the electrodes inside the battery and thus de-facto interrupts the exothermic reaction and the explosion-proof valve releases the gas overpressure outside the battery. The combination of electronic and mechanical (temperature and pressure) protection makes Fenix batteries among the safest Li-ion batteries available.

The 18650 battery is roughly equivalent in size to two CR123A lithium batteries, which is why it is often used in lights as a rechargeable alternative to these primary cells. Check first if your appliance supports this cell. This battery is designed to operate in Fenix E28R, PD32R, PD35, PD35R, TK11R, TK25 UV, TK25 Red, LD30R, WT25R LED flashlights, for example. LED headlamps Fenix HL55, HL60R, HP25R (1000lm version only), HP30R (1750lm version only), HM60R, HM61R, HM65R, HM65R-T, lanterns CL26R, CL30R and bicycle lights Fenix BC21R and BC30.

Please note, due to length and diameter it may not fit some old models - for example Fenix PD31, TK11, TK21.

Fenix 18650 4000mAh battery parameters

• Nominal voltage: 3.6 V
• Capacity: 4000 mAh.
• Maximum current draw : 7 A
• Maximum charging current : 4 A
• Dimensions : 18.75mm (diameter) x 69.2mm (length) (+/- 0.5mm)
• Weight 55 grams
• Protection against overcharge, full discharge and short circuit (>7 A). The protection circuit is fixed on the plus pole.
• Lifetime of more than 500 charging cycles
• Recommended operating temperatures: 0-45°C (charging), -20 to +60°C (discharging)
• Package contents: one Fenix 18650 4000mAh battery (ARB-L18-4000).

Recommended chargers

Fenix ARE-A2 charger
Charger Fenix ARE-A4
USB charger Fenix ARE-D1
USB Charger Fenix ARE-D2
Mini USB Charger MC1
USB Charger SC1
Dual Channel USB Charger FC2
USB Charger Lii-100
Lii-500S charger
Eight Channel USB Charger VC8
SkyRC MC3000

Notice

• If you are using an older charger purchased approx. before 2014, please check first that it will fit 69-70mm batteries.
• If possible, do not discharge the battery below 2.5 V
• Do not short-circuit the battery (do not connect the cell poles with a wire)
• Do not throw the battery into fire or water
• Never insert the battery into the charger in reverse (opposite polarities)
• When using the battery, observe the safety principles
• Use only an adequate charger supporting Li-ion batteries

Warranty

Two years warranty.