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Is it safe to charge my MacBook Pro 16 2021 from monitor which gives 96W, considering battery comes with MacBook is 140W?
Can it damage my battery?
Not use type-c, but connect via HDMI/DisplayPort?
Plug 140W MagSafe 3 when plugging monitor in?
Both option are not really convenient, so I wonder should I even care...
External monitor connected via usb-c indeed charges my MacBook Pro with 96W. So, I'm trying to understand if this is fine, cause for previous MacBook models usage of lower wattage chargers used to cause extremely quick battery degradation.
External monitor connected via usb-c indeed charges my MacBook Pro with 96W. So, I'm trying to understand if this is fine, cause for previous MacBook models usage of lower wattage chargers used to cause extremely quick battery degradation.
Every device capable of charging your computer over Every interface requires that negotiation: Power adapter via USB-C, display via USB-C, or MagSafe.
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) 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.
Not sure I'm following you. Plugging in you external monitor via the monitor display cable to the MacBook Pro will not charge the MacBook Pro. and you would not want to charge your computer any other way except by using the MagSafe 3.
I learn something new every day, but back to the question. As you have said the external monitor will charge your MacBook Pro. But since it does not charge at the same rate as the 140 watt charger it will be slower.And if your power consumption is higher it can drain the battery. Which could increase the number of charge cycles on the battery. Let me use an example I'm more familiar with. An auto battery is 12 volts, but an alternator will put out 14.5. If it only puts out 12 volt it will charge the battery, but not as efficiently. and if the system is using more power as at night with lights on it will not keep up. Does that make sense.
One reason you may want to stick with a dedicated charger is that MBPs charge using "negotiation". The MBP demands power, the charger reads the message and adjusts its feed. As the MBP approaches 100% its demands will be less to "coast into" 100% rather than "slam in", and any device that does not honor that "negotiation" will be less effective.
Type-C monitor charging MacBook Pro 16 2021
