Flextail Zero Power 5k vs Nitecore Carbon Battery 6k
Weight and specs compared for 2026 — and which one to choose.
Lightweight USB-C power bank with dual ports. At 85g, it's the lightest UL battery pack on the market.
Upgraded power bank from NB Air 5k with higher IPX8 rating and increased capacity.
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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Flextail Zero Power 5k vs Nitecore Carbon Battery 6k: which should you buy?
If saving weight is your priority, the Flextail Zero Power 5k wins — at 85 g it is 3 g (3%) lighter than the Nitecore Carbon Battery 6k (88 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 electronics page, or browse the full gear weight database.