The Fenix 21700 6000 mAh rechargeable battery (ARB-L21-6000) with electronics protection delivers 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.
Attention, the dimensions of the battery are 22 millimeters x 76.6 millimeters, making it larger in diameter than the common Li-ion type 21700. So it only fits in some flashlights and headlamps. We have verified compatibility in these Fenix flashlights: TK22R, TK30R, HT18R, HT32, LR36R, LD45R, PD40R V3.0, PD36R V2.0.
The Fenix battery protection consists of internal safety mechanisms and protective electronics. Added electronic circuits prevent the cell from overcharging, over-discharging. It protects against short circuit or too high current draw. If the battery electronics assess that the limits have been reached, they safely disconnect the cell.
Internal protection consists of a separator, state-of-the-art overheat protection (HRL - Heat Resistance Layer) and a special anti-blast valve. In the event that 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 excess gas pressure outside the battery. The combination of electronic and mechanical (temperature and pressure) protection makes Fenix batteries among the safest li-ion batteries available.
Due to the length of the battery 76.6 millimeters (including protective electronics), it can only be charged in chargers that are adapted to this length. See recommended chargers below.
Fenix 21700 6000mAh Battery Specifications
- Nominal voltage : 3.6 V
- Capacity : 6000 mAh, tested at 0.2 C discharge current with termination at 2.5 V and 25°C
- Maximum current draw : 10 A
- Recommended charging current: 1.2 A
- Maximum charging current: 4.2 A
- Dimensions: 22 mm (diameter) x 76.6 mm (length)
- Weight 80 grams
- Compatible with Fenix flashlights: TK22R, TK30R, HT18R, HT32, LR36R, LD45R, PD40R V3.0, PD36R V2.0.
- Overcharge, full discharge and short circuit protection (>10 A). Protection circuit mounted on the plus pole.
- Lifetime of more than 500 charge cycles
- Recommended operating temperatures: 0-45°C (charging), -20 to +60°C (discharging)
- Scope of delivery: one piece of Fenix 21700 6000mAh battery (ARB-L21-6000).
Recommended chargers
Because of the battery's 76.6 millimeters length (including protective electronics), it can only be charged in chargers that are designed for this length and are listed below. It will not fit in other models.
Fenix ARE-X1 V2.0 Charger
Fenix ARE-A2 Charger
USB charger Fenix ARE-D1
USB charger Fenix ARE-D2
Fenix ARE-A4 Charger
USB Charger FC2
USB Charger SC1
8-channel USB charger VC8
Warning
- Do not discharge the battery below 2.5V if possible
- Do not short-circuit the battery (do not connect the cell poles with a wire)
- Do not throw the battery into fire or water
- Do not insert the battery into the charger in reverse (opposite polarities)
- When using the battery, observe safety guidelines
- Use only an adequate charger that supports Li-ion batteries
Warranty
Warranty two years.
