Fenix 18650 4000 mAh USB-C

Top rechargeable batteries Fenix 18650 4000 mAh with own charging USB-C connector (ARB-L18-4000U) with protection electronics (protected) bring the highest real 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 in relation to the size and weight of the battery.

The battery can be charged by connecting a 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.

Note that this battery is about 72 millimeters long due to the added USB-C charging connector, so it is significantly longer than a regular 18650 Li-ion battery. So it only fits some flashlights, headlamps and chargers. We have verified compatibility in these lights and headlamps Fenix: Fenix PD32R, Fenix PD35 V3. 0 , Fenix E28R V2. 0 , Fenix LD30R, Fenix TK11 TAC, TK11R, TK26R, Fenix TK35 UE V2.0 (5000 lumens), Fenix CL26R, Fenix CL30R, Fenix HM62-T, HM65R-T V2. 0 , HM75R, Fenix HM61R, Fenix HM61R V2. 0 .

Battery protection Fenix consists of internal safety mechanisms and protective electronics. The added electronic circuits prevent overcharging of the cell, over-discharging and short-circuiting or too high current draw. If the battery electronics evaluate that the limit values have been reached, it will 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 threshold, 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. 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 USB-C battery Fenix 18650 4000 mAh

• Nominal voltage: 3.6 V
• Capacity: 4000 mAh
• Maximum current draw: 7 A
• Maximum charging current: 4 A
• Dimensions: 18.75 mm (diameter) x 72 mm (length) (+/- 0.5mm)
• Weight: 50 grams
• Protection against overcharge, full discharge and short circuit (>7 A). Protective circuit attached to the plus pole.
• Lifetime of more than 500 charging cycles
• Recommended operating temperatures: 0-45°C (charging), -20 to +60°C (discharging)
• Scope of delivery: one piece of battery Fenix 18650 4000mAh (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 glows red while charging. It glows blue when fully charged. When using a USB power supply with a current of 1500 mA and higher, the charging time is about 2.5 hours.

Recommended chargers

Charger Fenix ARE-A2
Charger Fenix ARE-A4
USB charger Fenix ARE-D1
USB charger Fenix ARE-D2
Two-channel USB charger FC2
USB charger SC1
VC8 eight-channel USB charger
SkyRC MC3000

Notice

• The battery is approx. 72 mm long, check first if it will fit your device!
• As far as 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 pack into the charger in reverse (opposite polarities).
• When using the battery, please observe the safety principles.
• Use only an adequate charger that supports Li-ion batteries.