← Gear database
Nitecore NU21 vs Nitecore NU25 UL Headlamp
Weight and specs compared for 2026 — and which one to choose.
Nitecore NU21 is the lighter option — 1 g lighter than the Nitecore NU25 UL Headlamp (2% less weight). If grams matter to you, that is the one to beat.
Nitecore NU21
44 g
Ultralight USB-C rechargeable headlamp with 360-lumen white and auxiliary red beams, built for running and minimalist hiking.
Check price Full details →Nitecore NU25 UL Headlamp
45 g
Ultralight USB-C rechargeable headlamp with 400-lumen output and dual red-light modes. Weighs less than three AA batteries.
Check price Full details →Nitecore NU21 vs Nitecore NU25 UL Headlamp: which should you buy?
If saving weight is your priority, the Nitecore NU21 wins — at 44 g it is 1 g (2%) lighter than the Nitecore NU25 UL Headlamp (45 g). That said, the heavier option may justify the extra grams with more capacity, durability or comfort, so weigh the trade-off against how you'll use it.
See where both rank against everything else in this category on the lightest lighting page, or browse the full gear weight database.