Fenix TK 21 Low voltage Protection

md17

Enlightened
Joined
Oct 28, 2023
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259
Location
usa ct
I have an older Fenix TK 21. Does anyone know if it is safe to use unprotected 18650 cells in this light. Most protected cells are too big. Thanks


IMG_6886.jpeg
 
If this is your model, someone here quoted Fenix as stating that it has low voltage detection, which might influence your decision:


Personally I'd try to find some protected cells that will fit, and use them if I could, but that's just my preference. If the light can guard against overdischarge, some feel that's sufficient. You may not feel you need cells with protection from overcharging, for example, but I prefer to have both at the cellular level that when it's a practical option.
 
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