Does charging an iPhone from a MacBook wear out the MacBook battery if it's also charging?

[ebelinski]

Hello, I upgraded to an M1 MBP and I'm trying to make sure my habits won't put on too many cycles on the battery too quickly. As far as I understand, when a MacBook is charging, the system uses power directly from the charger, instead of the battery. Is this also the case for devices that are also plugged into the MacBook? For example, if I plug my MacBook in to charge, and I plug my iPhone into my MacBook, will the system send power directly from the MacBook charger to the iPhone?

I tend to keep my iPhone plugged in a lot for things like iPhone app development, USB-connected hotspot, etc.

 

[satcomer]

Your taking a charging pass through they want is charging stations! Yes if you plug an iHine into the Mac it will pass through power to your iPhone

 

[ebelinski]

Your taking a charging pass through they want is charging stations! Yes if you plug an iHine into the Mac it will pass through power to your iPhone

I'm sorry but I don't really know what this means lol.

 

[satcomer]

I'm sorry but I don't really know what this means lol.

it mean if you plug in your Mac it will power up the phone from that connection, also from a Thunderbolt 3 powered Dock!

 

[ThirteenXIII]

from my understanding on portables that are plugged in (charging), it will distribute the power depending on the current battery capacity. Apple used to be good at power management with batteries and I don't know if anything has changed recently in term of that. but its best to allow the batteries to be used without a charger for a period of time and infrequently power cycle them.

So having your phone and Mac charging at the same time shouldn't cycle the battery or stress it too much as it should deliver/distribute power if the Mac is already fully charged.

Batteries - Maximizing Performance

Maximize the life and lifespan of the rechargeable lithium-ion batteries in your MacBook, iPod, iPhone, and iPad.

www.apple.com

Batteries - Maximizing Performance

Maximize the life and lifespan of the rechargeable lithium-ion batteries in your MacBook, iPod, iPhone, and iPad.

www.apple.com