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I have 2019 16" MacBook Pro which is permanently plugged into an LG UltraFine display.
I understand that having it permanently plugged into power will reduce battery life but I don't want to lose the use of my monitor while letting the battery discharge occasionally.
Is there a way to tell the MacBook to only output to the monitor and not charge from it?
MacBook Pro 16", macOS 10.15
Hello AndyGrayson,
Thank you for using Apple Support Communities! I understand that you're wondering if there's a way to prevent your MacBook Pro from charging through the connected LG UltraFine display when the Mac is disconnected from its charger. I would be happy to help provide more information to consider.
The lithium battery in your Mac is designed to count a full charge cycle only when it has discharged 100% of the batteries total capacity. If it works best for you, leaving the Mac permanently connected to a charger will not negatively impact the battery life with the way charge cycles are designed to work. You can learn more about this feature by visiting the following resources:
If the Mac is connected to another device capable of charging it using a Thunderbolt 3 port, it is expected behavior for the Mac to charge from that device when not plugged in to an AC adapter. There is not a way to disable this behavior:
Charge your MacBook Pro with Thunderbolt 3 - Apple Support
Take care.
Hello AndyGrayson,
Thank you for using Apple Support Communities! I understand that you're wondering if there's a way to prevent your MacBook Pro from charging through the connected LG UltraFine display when the Mac is disconnected from its charger. I would be happy to help provide more information to consider.
The lithium battery in your Mac is designed to count a full charge cycle only when it has discharged 100% of the batteries total capacity. If it works best for you, leaving the Mac permanently connected to a charger will not negatively impact the battery life with the way charge cycles are designed to work. You can learn more about this feature by visiting the following resources:
If the Mac is connected to another device capable of charging it using a Thunderbolt 3 port, it is expected behavior for the Mac to charge from that device when not plugged in to an AC adapter. There is not a way to disable this behavior:
Charge your MacBook Pro with Thunderbolt 3 - Apple Support
Take care.
Is there any way making my MacBook Pro not charge from an external monitor?
