Pavel Jelic I bet many of you use a MacBook as your primary work tool. It's not the same for me, and it's been for several long years. Since I have to move relatively often between home, work and other places, a Mac or iMac makes no sense to me. While most of the time my MacBook is plugged in all day, sometimes I find myself in a situation where I need to unplug it for a few hours and run on battery power. But this is exactly what became relatively difficult with the arrival of macOS 11 Big Sur, as I often found myself in a situation where the MacBook was not charged to 100% and I thus lost several tens of minutes of extra endurance.
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If you are one of those users, you may have run into similar problems with the arrival of macOS Big Sur. All this is due to a new feature called Optimized Charging. Originally, this function first appeared on iPhones, later also on Apple Watch, AirPods and MacBooks. In short, this function ensures that the MacBook will not charge more than 80% if you have it connected to power and that you will not disconnect it from the charger in the near future. The Mac will gradually remember when you usually charge it, so charging from 80% to 100% will only start at a certain time. As such, batteries prefer to be in the range of 20-80% charge, anything outside this range can cause the battery to age faster.
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Of course, I understand this feature with Apple phones - most of us charge our iPhone overnight, so Optimized Charge will estimate that the device will stay at 80% charge overnight, and then start charging to 100% a few minutes before you get up. It should be the same with MacBooks, in any case, the system unfortunately misses the mark in many cases, and in the end you disconnect the MacBook only with 80% charge (and less) and not with 100%, which can be a big problem for some. The Mac charging analysis itself can be inaccurate in certain cases, and let's face it, some of us end up at work irregularly and from time to time we find ourselves in a situation where we simply need to quickly grab our MacBook and leave. It is exactly for these users that Optimized Charging is not suitable and they should disable it.
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On the contrary, if you are one of those people who use a MacBook and only charge it at work, with the fact that every day you arrive at, for example, 8 a.m., leave exactly at 16 p.m. and don't go anywhere in between, then you will certainly use Optimized charging and even your battery in better condition over time. If you want on your MacBook (De)activate optimized charging, then go to System Preferences -> Battery, where on the left click on the tab Battery, and then tick whether tick off column Optimized charging. Then just tap on Turn off. As I mentioned above, disabling this feature can cause the battery to chemically age faster and you will have to replace it a little sooner, so take that into account.
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