Fenix 21700 5000 mAh Li-Ion USB-C

Product description

Rechargeable battery Fenix 21700 5000 mAh (ARB-L21-5000U) with its own USB-C charging connector. It can be charged by connecting a cable to the USB-C connector (e.g. from a computer, power bank or mobile phone charger) or in a classic Li-ion charger.

Rechargeable batteries Fenix 21700 5000 mAh (ARB-L21-5000U) with protection electronics (protected) are based on the cutting-edge LiNiCoO2 technology, which brings higher safety and also longer life. Li-ion rechargeable batteries are characterized by very high capacity, do not suffer from memory effect or self-discharge. Li-ion in size 21700 are the best choice in terms of stored energy due to the size and weight of the battery, they are gradually being promoted, for example, in the automotive industry.

Battery protection Fenix consists of internal safety mechanisms and protective electronics. The added electronic circuits prevent overcharging of the cell, over-discharging and also 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, state-of-the-art Positive Temperature Coefficient (PTC) overheating protection and a special explosion-proof valve. If the gas pressure in the cell exceeds a certain threshold, the internal electrode separator inside the battery separates the electrodes and thus de-facto interrupts the exothermic reaction and the explosion-proof valve discharges the gas overpressure outside the battery. Thanks to the combination of electronic and mechanical (temperature and pressure) protection, Fenix batteries are among the safest Li-ion batteries available.

This battery is designed for use for example in LED luminaires Fenix HT18, PD36R, TK22 V2.0, TK22 UE, E35 V3.0. However, it cannot be used in 18650 battery lanterns due to its larger size!

Due to the 76 millimetre length of the battery (including the protective electronics), it can only be charged in chargers that are designed for this length. See. recommended chargers below.

Parameters of USB battery Fenix 21700 5000mAh

• Nominal voltage: 3.6 V
• Capacity: 5000 mAh, tested at a discharge current of 0.2 C with termination at 2.5 V and 25°C
• Maximum current draw : 8 A
• Maximum charging current: 5 A
• Charging current of built-in USB-C connector 2A. Charging time approximately 3-4 hours.
• Dimensions: 21.5mm (diameter) x 76mm (length) (+/- 0.5mm)
• Weight 72.5 grams
• Protection against overcharge, full discharge and short circuit (>8A). 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 piece USB battery Fenix 21700 5000mAh (ARB-L21-5000U)
• Charging cable not included. If needed, a basic USB-C cable or a coloured USB-C cable can be purchased, or a micro-USB to USB-C reducer can be used.

Charging via USB-C connector

Plug the USB cable into the side USB-C connector, during charging the indicator light at the plus pole of the battery is red. It glows blue when fully charged.

Recommended chargers

The battery can also be charged in Li-ion battery chargers type 21700:

Charger Fenix ARE-A2
USB charger Fenix ARE-D1
USB charger Fenix ARE-D2
Charger Fenix ARE-A4
USB charger SC1
VC8 eight-channel USB charger

Notice

• 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.