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BioLite Range 400 vs Black Diamond Deploy 325
Weight and specs compared for 2026 — and which one to choose.
Black Diamond Deploy 325 is the lighter option — 35 g lighter than the BioLite Range 400 (47% less weight). If grams matter to you, that is the one to beat.
BioLite Range 400
75 g
USB-C rechargeable headlamp with 400 lumens, IP67 rating and fast charging that adds an hour of run time in eight minutes.
Check price Full details →Black Diamond Deploy 325
40 g
Minimalist compact headlamp at just 40g. 325 lumen max output with single-button operation. Folds flat for easy stashing in hip belt pockets.
Check price Full details →BioLite Range 400 vs Black Diamond Deploy 325: which should you buy?
If saving weight is your priority, the Black Diamond Deploy 325 wins — at 40 g it is 35 g (47%) lighter than the BioLite Range 400 (75 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.