Simple. Pluged in, power indicator indicates that the M1 MacBook Pro is plugged in and over a couple of hours of sporadic usage, drops from 100% to 88% and going. Only using Safari and a document platform connected to a server to access and update files.
MacBook Pro (M1, 2020)
Apple implemented a new Battery Health Management system with an update to macOS 10.15.x Catalina which affected how USB-C model laptops charge their batteries. With Optimized Charging enabled (default setting), macOS will periodically drain the battery to 80% charge in order to exercise the battery....and will stop charging at 80% as well. This is to help maintain better battery health especially for people who leave their laptops connected to their power adapters all the time (or the majority of time). See these Apple articles for details:
About battery health management in Mac laptops - Apple Support
If battery charging is paused or on hold on your Mac - Apple Support
Charge the MacBook Pro battery - Apple Support
Apple implemented a new Battery Health Management system with an update to macOS 10.15.x Catalina which affected how USB-C model laptops charge their batteries. With Optimized Charging enabled (default setting), macOS will periodically drain the battery to 80% charge in order to exercise the battery....and will stop charging at 80% as well. This is to help maintain better battery health especially for people who leave their laptops connected to their power adapters all the time (or the majority of time). See these Apple articles for details:
About battery health management in Mac laptops - Apple Support
If battery charging is paused or on hold on your Mac - Apple Support
Charge the MacBook Pro battery - Apple Support
Down to 85% from initial posting moments ago, even as screen was completely dimmed while on another computer ...
Battery is draining while plugged-in!?
