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The Fenix 18650 2600 mAh rechargeable batteries (ARB-L2) with protection are based on lithium ion technology. 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 circuit or over-current draw. If the battery electronics assess that the limit values have been reached, they safely disconnect the cell.

Internal protection consists of a separator, state-of-the-art Heat Resistance Layer (HRL) protection 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 the Fenix battery one of the safest li-ion batteries available.

The 18650 battery is roughly the size of two CR123A lithium batteries, which is why it is often used in flashlights as a rechargeable alternative to these primary cells. Please check first if your appliance supports this cell. This battery is designed for use in LED flashlights, LED headlamps and bike lights, for example:

• Fenix LD50
• Fenix LD60
• Fenix SD10
• Fenix E35
• Fenix PD32
Fenix PD35
• Fenix TK09
• Fenix TK15
• Fenix TK22
• Fenix TK32
• Fenix TK35
• Phenix TK51
• Phenix TK61
• Phenix TK75
• Phenix TK76
• Phenix HL55
• Phenix HP12
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• Fenix HP30
• Fenix HP40F
• Fenix BT20
• Fenix BC30

• Nominal Voltage : 3.7 V
• Capacity : 2600 mAh
• Maximum current draw : 2C (6.8 A)
• Maximum charging current : 0.8C (2 A)
• Dimensions: 18.5 mm (diameter) x 68.7 mm (length) (+/- 0.5mm)
• Weight 49 grams
• Overcharge, full discharge and short circuit protection (>7 A)
• Lifetime of more than 500 charge cycles
• Recommended operating temperatures: 0-45°C (charging), -20 to +60°C (discharging)

• Fenix ARE-X2 USB charger
• Fenix ARE-C2 charger
• Fenix ARE-C1+ Charger
• Fenix ARE-X1+

Caution
If you are using an older charger purchased approx. before 2014, please check first if it will fit 69-70mm batteries. If possible, do not discharge the battery below 2.5V. 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 the safety principles. Use only an adequate charger that supports li-ion batteries.