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Garmin Instinct 3 Solar 45mm vs Nitecore NB20000

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

Garmin Instinct 3 Solar 45mm is the lighter option — 327 g lighter than the Nitecore NB20000 (86% less weight). If grams matter to you, that is the one to beat.
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Spec Garmin Instinct 3 Solar 45mm Nitecore NB20000
Weight 53 g · 0.053 kg · 0.12 lb 380 g · 0.380 kg · 0.84 lb
Brand Garmin Nitecore
Category Electronics Electronics
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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Nitecore NB20000
380 g

Lightweight 20000mAh power bank with dual outputs.

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Garmin Instinct 3 Solar 45mm vs Nitecore NB20000: which should you buy?

If saving weight is your priority, the Garmin Instinct 3 Solar 45mm wins — at 53 g it is 327 g (86%) lighter than the Nitecore NB20000 (380 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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