Fenix 21700 high-current battery, 4000 mAh, (Li-Ion)
Top high-current rechargeable batteries Fenix 21700 4000 mAh (ARB-L21-4000P) with electronic protection (protected) are designed for a discharge current of up to 18 A. Li-ion rechargeable batteries are characterized by a very high capacity, they 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 dimensions and weight of the accumulator, they are gradually gaining ground, for example, in the automotive industry.
Fenix battery protection consists of internal safety mechanisms and protective electronics. The added electronic circuits prevent the cell from being overcharged, its excessive discharge, as well as a short circuit or excessively high current consumption. If the battery electronics evaluates reaching the limit values, it safely disconnects the cell.
The internal protection consists of a separator, the most modern protection against overheating (PTC - Positive Temperature Coefficient) 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 and thus de-facto interrupts 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, Fenix batteries are among the safest Li-ion batteries available.
This battery is intended especially for use in the Fenix LR35R LED flashlight. However, it can also be used in Fenix HT18, PD36R, PD36 TAC, PD40R, TK22 V2.0, TK22 UE, E35 V3.0 and C7 lamps. However, it cannot be used in 18650 battery lights due to its larger dimensions!
Due to the length of the battery of 76 millimeters (including protective electronics), it can only be charged in chargers that are adapted to this length. Viď. recommended chargers below.
Parameters of the Fenix 21700 4000mAh battery
- Nominal voltage: 3.6 V
- Capacity: 4000 mAh, tested with a discharge current of 0.2 C with termination at a voltage of 2.5 V and a temperature of 25°C
- Maximum current consumption: 18 A (max. for 3 minutes, long-term 10 A)
- Maximum charging current: 4 A
- Dimensions: 21.5 mm (diameter) x 76 mm (length) (+/- 0.5 mm)
- Weight 70 grams
- Protection against overcharging, total discharge and short circuit (>18 A). The protective circuit is attached to 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 21700 4000mAh battery (ARB-L21-4000P).
Recommended chargers
Due to the length of the battery of 76 millimeters (including protective electronics), it can only be charged in chargers that are adapted to this length and are listed below. It will not fit in other models.
Charger Fenix ARE-X1 V2.0
Charger Fenix ARE-A2
Fenix ARE-D1 USB charger
Fenix ARE-D2 USB charger
Charger Fenix ARE-A4
USB charger FC2
USB charger SC1
Eight-channel USB charger VC8
Warning
- 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
Capacity: 4000 mAh
Weight: 70 g
| product ID | 131804 |
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