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macOS Big Sur’s battery optimization: You can’t do much to tweak laptop settings

In macOS 10.15 Catalina, Apple brought the first part of the existing iOS/iPadOS battery-charging optimization algorithm to Mac laptops with Thunderbolt 3 capability. Instead of always charging your laptop battery to 100 percent and then topping it off whenever it’s plugged in, the 10.15.5 update of Catalina added a Battery Health Management checkbox in the Energy Saver preference pane that throttles charging as a battery’s capacity reduces over time. (Many Mac models without Thunderbolt 3 can run Catalina and Big Sur, but they can’t use this improved charging routine.)

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