Fenix HL22 Premium R4

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I have not had any problems using the HL21 and HL22 model outdoors. As batteries I use Sanyo Eneloops, they are cold resistant, unlike 90% of other battery brands. (Yeah, I bought a lot of different batteries and tested them in 2009)

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I have two previous FL21 models, and both have the same problem. When you turn off the light in the frost, it will no longer turn on until it has been at room temperature for a long time. If not turned off, it will return no matter how long and no matter how cold. According to the importer, this is due to the high threshold voltage of the regulator in the luminaire, and is remedied by replacing the battery with one whose voltage does not drop in the cold. I've tried olleella breast pocket back-up battery and the battery, and still will not turn on until the lamp is warming up. The lamp is not suitable for frost at all. The same problem may exist in all Fenixes, as all of these advertise regulation. Basically, this is a great luminaire when running on a single AA battery. Its energy content is almost equal to that of the three AAA cells in typical luminaires. However, the batteries are a much cheaper package, and the batteries become empty when used (except in the cold). The combination of three cells, on the other hand, is cumbersome as batteries, as chargers are usually for an even number of cells and uneven discharge of the cells shortens their life. One would be optimizing, and this lamp would use (in warm weather) its single cell really accurately. It is a pity that the practical implementation is not suitable for the North. After all, it’s good to note that in LEDs in this power class, batteries last an insanely long time, and batteries shouldn’t be considered. So Fenixit can forget and choose a traditional three-cell headlamp without a regulator. There is a good selection of them in this shop as well.