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April 16, 2020 08:05 pm

Apple Changes Default MacBook Charging Behavior To Improve Battery Health

The way MacBook batteries charge is about to change. Apple has released a new developer preview of macOS Catalina 10.15.5, and as these releases often do, it contains a new feature: Battery Health Management. From a report: The new feature, which will only be available on Mac notebooks with Thunderbolt 3 ports, enables a new default approach to charging and discharging MacBook batteries. According to Apple, the feature is meant to reduce the rate of chemical aging of the MacBook's battery, thereby extending its long-term lifespan -- but without compromising on day-to-day battery life. The feature works by analyzing the temperature of the battery over time, as well as the charging pattern the laptop has experienced -- in other words, does the laptop frequently get drained most of the way and then recharged fully, or is it mostly kept full and plugged in? In the latter case, Battery Health Management is more likely to stop a bit short of full capacity in order to extend the battery's long-term lifespan. (All charging data is kept private on the MacBook unless the Mac has been opted in to share anonymous analytics data with Apple.) Charging a modern laptop battery to 100% and leaving it there for extended periods of time -- especially at warm temperatures -- can dramatically reduce the battery's usable life. This is hardly limited to laptops: I own an electric car, and the manufacturer makes it very clear that it should be routinely charged to only 80 percent to extend its battery lifespan.

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