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Anker PowerCore 20100 vs Flextail Zero Power 5k

Weight and specs compared for 2026 — and which one to choose.

Flextail Zero Power 5k is the lighter option — 271 g lighter than the Anker PowerCore 20100 (76% less weight). If grams matter to you, that is the one to beat.
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Spec Anker PowerCore 20100 Flextail Zero Power 5k
Weight 356 g · 0.356 kg · 0.78 lb 85 g · 0.085 kg · 0.19 lb
Brand Anker Flextail
Category Electronics Electronics
Anker PowerCore 20100
356 g

High capacity 20100mAh power bank for extended trips.

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Flextail Zero Power 5k
85 g

Lightweight USB-C power bank with dual ports. At 85g, it's the lightest UL battery pack on the market.

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Anker PowerCore 20100 vs Flextail Zero Power 5k: which should you buy?

If saving weight is your priority, the Flextail Zero Power 5k wins — at 85 g it is 271 g (76%) lighter than the Anker PowerCore 20100 (356 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.

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