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Anker PowerCore 20100 vs Garmin Instinct 3 Solar 45mm

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

Garmin Instinct 3 Solar 45mm is the lighter option — 303 g lighter than the Anker PowerCore 20100 (85% less weight). If grams matter to you, that is the one to beat.
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Spec Anker PowerCore 20100 Garmin Instinct 3 Solar 45mm
Weight 356 g · 0.356 kg · 0.78 lb 53 g · 0.053 kg · 0.12 lb
Brand Anker Garmin
Category Electronics Electronics
Anker PowerCore 20100
356 g

High capacity 20100mAh power bank for extended trips.

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Garmin Instinct 3 Solar 45mm
53 g

Rugged solar-powered GPS watch. 36-90 days smartwatch battery with solar charging capability.

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Anker PowerCore 20100 vs Garmin Instinct 3 Solar 45mm: which should you buy?

If saving weight is your priority, the Garmin Instinct 3 Solar 45mm wins — at 53 g it is 303 g (85%) 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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