Wear OS 4 'hybrid interface' will 'dramatically' boost battery life

The OnePlus Watch 2 touts "dramatically extended battery life" thanks to a “substantially expanded” Wear OS hybrid interface

Google's new Wear OS 4 brings better battery life - The Verge

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Pixel Watch 3 battery life might get a boost with 'hybrid' Wear OS

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OnePlus Watch 2's battery lasted even when I forgot the charger