Macbook Pro 13" 2020 Battery drains to 90% despite being plugged in to the charger

HeySayJesKuh wrote:

Hello, I just recently started using my Macbook Pro 13" 2020 a few days ago. And for some reason, I noticed that for 2 nights in a row, the battery would drop down to about 90%? and it will charge back up to 100% again... But I find this very odd because I almost never take the laptop off the charger. So why would it loose battery when it's on the charger? I also had this laptop custom built to how I want it too... And I am also on the latest 10.15 OS too...

This is the new normal—

macOS Catalina 10.15.5 introduces battery health management, a feature designed to improve the lifespan of your Mac notebook's battery.

The Battery Health button appears in >SystemPreferences>Energy Saver —this feature is limited to Mac laptops with Thunderbolt 3 ports. That equates to all MacBook Pro models released since late 2016 and the Retina-capable MacBook Air models released since 2018.

About battery health management in Mac notebooks https://support.apple.com/en-us/HT211094

https://www.apple.com/batteries/maximizing-performance/#macbooktips

Hi,

I have written something about this exact issue. https://discussions.apple.com/thread/251525381

Please check our thread, where you can find additional information and experiences with this issue.

Maybe you want to contribute to solving this issue and hopefully getting attention from Apple on this topic.