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<blockquote data-quote="MacInWin" data-source="post: 1935494" data-attributes="member: 396914">Ashwin referred to iOS, but macOS is what he really meant. It's a built-in feature that kicks in after about a week of usage. The system &quot;learns&quot; you work mostly on power, so it sets the charger to stop and &quot;hover&quot; around that number. When you take it off charge and use the battery, it returns to 100% until it re-learns. I didn't know CoconutBattery could force the switch.As for not charging to 100%, that's kind of an urban legend that started when somebody discovered that battery makers build in the lower limit for safety. Lithium batteries should not be taken to 100% of the actual capacity as it becomes increasingly risky. So makers set an artificial limitation by reporting 100% when there are a couple of percent left. The internals of the battery then got conflated to be &quot;Apple is ding this&quot; and the legend was born. In fact, when your Mac reports 100%, that is as high as the battery will allow. In fact, as the battery ages and the capacity declines, that 100% is also reset lower, so that 100% always means 100% of what the battery can provide at the time.</blockquote>

[QUOTE="MacInWin, post: 1935494, member: 396914"] Ashwin referred to iOS, but macOS is what he really meant. It's a built-in feature that kicks in after about a week of usage. The system "learns" you work mostly on power, so it sets the charger to stop and "hover" around that number. When you take it off charge and use the battery, it returns to 100% until it re-learns. I didn't know CoconutBattery could force the switch. As for not charging to 100%, that's kind of an urban legend that started when somebody discovered that battery makers build in the lower limit for safety. Lithium batteries should not be taken to 100% of the actual capacity as it becomes increasingly risky. So makers set an artificial limitation by reporting 100% when there are a couple of percent left. The internals of the battery then got conflated to be "Apple is ding this" and the legend was born. In fact, when your Mac reports 100%, that is as high as the battery will allow. In fact, as the battery ages and the capacity declines, that 100% is also reset lower, so that 100% always means 100% of what the battery can provide at the time. [/QUOTE]

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