https://www.macrumors.com/how-to/control-optimized-battery-charging-apple-watch/
On Apple Watch models running watchOS 7 and later, Apple includes a Battery Health feature that's similar to the one found on iPhones and iPads...
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https://support.apple.com/en-az/105106
With Optimized Battery Charging, your Apple Watch learns from your daily charging habits to improve the lifespan of your battery. And supported Apple Watch...
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