Internal protection consists of a separator, PTC thermal protection and a special explosion-proof 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, which is why it is often used in flashlights as a rechargeable alternative to these primary cells. Please check first whether your appliance supports this cell. This battery is designed for use in Fenix E28R, E30R, Fenix E35 UE (not designed for E35 V3.0), PD32 V2.0, PD35, TK11 TAC, TK15, TK16 (1000 lm version only), TK25 UV, TK25 IR, TK25 Red, TK25 R&B, TK26R, TK75, FD41, LD30, SD11, SD20 LED flashlights. LED headlamps Fenix HL55, HL60R, HP25R (1000lm version only), HP30R (1750lm version only), HM60R, HM61R, HM65R, HM65R-T, lanterns CL26R, CL30R and bike lights Fenix BC21R and BC30.

Caution: due to the length of 70mm and diameter it may not fit some old models – for example Fenix PD31, TK11, TK21, TK30, Zebralight, Solarforce. The battery is also not compatible with Fenix FD65 and Fenix TK47 models.

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Fenixlight Ltd began designing and manufacturing high quality personal lighting products in 2001 and has developed into an internationally recognized brand producing high-end flashlights, bike lights, headlamps, camping lamps and accessories. Today, the Fenix brand is trusted by the most demanding professionals who require powerful lighting. Our clientele include military, first responders, law enforcement, industrial professionals who depend on Fenix to turn the dark into light.