Optimized Battery Charging macbook pro 16 m1 max

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Level 1

12 points

Optimized Battery Charging macbook pro 16 m1 max

Hello everyone,

after two months of use with the macbook pro as a desktop replacement I was wondering why for a couple of weeks has gone from keeping the charge at 80% to having it always at 100%? Maybe because now it takes power not only from the external monitor but also from a new external thunderbolt 3 hard disk that takes the charge from there? The laptop is connected to an external monitor (benq sw321c) and I selected optimized charging. I don't understand why now I don't charge the laptop as before up to 80% and if keeping it as it is now at 100% is ok.

MacBook Pro 15″, macOS 10.15

Posted on Feb 5, 2022 7:09 PM

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Answer 1

Feb 5, 2022 7:53 PM in response to Serghios

Your MacBook Pro uses smart charging to charge in the optimum way, and only when necessary. Plugged in is Not necessarily actively charging. There is substantial hardware and software cooperating on battery and charging issues. Simply asserting a charging voltage against one of the interface(s) will NOT successfully charge your MacBook Pro.

An external power supply that provides "USB Power Delivery" (like certain displays) must negotiate over the USB cable using USB Power Delivery Protocol, and can not 'force itself' on your Mac. The Voltage and Current are delivered only after your Mac requests and the charger agrees to supply power under certain controlled conditions. The computer is in control of the entire process.

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Answer 2

Serghios Author

Level 1

12 points

Feb 6, 2022 8:11 AM in response to Grant Bennet-Alder

Hi Grant,

first of all thank you so much for your response.

I'm aware of what you've written, in great detail...the doubt remains because before I could see that the charge stopped at 80% and stayed that way for all days and work sessions while now it always reaches 100% (even with the optimized charge option checked that indicates that it will be recharged up to 80%).

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Optimized Battery Charging macbook pro 16 m1 max

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