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Is your MacBook’s battery stuck at 80% even with the charger attached? Apple’s battery-saving “Optimized Battery Charging” feature is to blame. Here’s how to charge your MacBook fully.
macOS Big Sur’s battery optimization: You can’t do much to tweak laptop settings Apple relies on your behavior over time balanced against battery wear, but doesn’t let you tweak its choices. Mac 911
Jan 12, 2021 9:00 pm PST Apple
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.)