Charging battery USB-C Fenix 18650 4000 mAh (Li-Ion)

The top of the line Fenix 18650 4000 mAh rechargeable battery (ARB-L18-4000) with protected electronics delivers the highest capacity on the market. Li-ion in the 18650 size are the best choice in terms of stored energy due to the size and weight of the battery.

Fenix battery protection consists of internal safety mechanisms and protective electronics. Added electronic circuits prevent the cell from overcharging, over-discharging and against short circuit or too high current draw. If the battery electronics assess that the limits have been reached, they safely disconnect the cell.

The internal protection consists of a separator, a state-of-the-artHeat Resistance Layer(HRL) 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 one of the safest li-ion batteries available.

The 18650 battery is roughly equivalent in size to two CR123A lithium batteries (but slightly longer and thicker), which is why it is often used in flashlights as a rechargeable alternative to these primary cells. Check first if your appliance supports this cell. This battery is designed for use in, for example, Fenix E28R, PD32R, PD35, PD35R, TK11R, TK25 UV, TK25 Red, LD30R, WT25R LED flashlights, Fenix HL55, HL60R, HP25R (1000lm version only), HP30R (1750lm version only), HM60R, HM61R, HM65R, HM65R-T, HM75R, CL26R, CL30R lanterns and Fenix BC21R and BC30 bike lights.

Please note, due to length and diameter may not fit some old models - for example Fenix PD31,..