Nitecore NU21 thoughts ultra lightweight headlamp

Nitecore NU21 lightweight headlamp for outdoors and trail running.
Having used and enjoyed the NU33 for as simple pick up and go light I was happy to look at this smaller brother. Stripped right back with a quick lace style band and low weight. So far im having fun testing it. Is it enough to actually trail run with? im still testing that. full review up when all testing is complete.

Dimensions 60.1mm x 33mm x 25.5mm (2.37" x 1.30" x 1.00")
Weight 44 g / 1.55 oz

#nitecore
#nu21
#headlamps

[stefanp]

Small weight=small built in battery. Generally junk.

[stefanp]

There has not yet been found one that would make a flashlight that with a power of 360lm shines for 2 hours on a 500mAh battery. Elon Musk himself would be shocked 🤣

[stefanp]

Power drops are "data magic". Therefore, it is worth looking for independent tests that show graphical readings of the workflow. Some flashlights reduce the power by 50 or even 80% in a few dozen seconds or a few minutes. Then in the data we have a record that SO MANY hours are lit "in max mode" ...

[denyyo]

jesus man how did i not found you earlier, you do such great reviews, touching everything

[stevenrobertson]

I've got no problem with the length of the videos they are full of useful info.Another good review.

[apcwjw]

Interesting initial thoughts. The olight perun 2 mini and the sofirn hs10 2700k/4000k are my current favourite lightweight headlamps due to 16340 compatibility. I could see this type of light being useful for a non flashaholic xmas gift.

[hamishdb]

Would be great to see a comparison between the NU21 and the very slightly larger NU25 :)

[stefanp]

This flashlight shines "in 360lm mode - 2 hours". And in practice? 5min and stepwise decrease to 150lm? Then it would be possible to spend 2 hours on this small battery.

[TopDog]

I don't know. Seems like a decent little light for indoor use, working on equipment etc. But not much of an outdoor headlamp. (good length for a video )

[javig]

In the 170 lumens mode, is it capable of staying on for the 3 hours indicated in the manual or does it drop to 60 lumens shortly so as not to overheat? I need 170 lumens for at least 1 hour.... I have the Nitecore H11 and it lowers the intensity shortly after turning on. thank you

[wellwhatthen]

Good review crap for trial use . . Need to stop harp on about cri