Black Diamond Deploy 325 vs Nitecore NU21
Weight and specs compared for 2026 — and which one to choose.
Minimalist compact headlamp at just 40g. 325 lumen max output with single-button operation. Folds flat for easy stashing in hip belt pockets.
Ultralight USB-C rechargeable headlamp with 360-lumen white and auxiliary red beams, built for running and minimalist hiking.
Building a pack? Add either one to your HikeLoad list, or drop its weight into the base weight calculator, and see what it does to your total weight.
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Black Diamond Deploy 325 vs Nitecore NU21: which should you buy?
If saving weight is your priority, the Black Diamond Deploy 325 wins — at 40 g it is 4 g (9%) lighter than the Nitecore NU21 (44 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.