It's faster to charge your iPhone 7 via a Macbook

sethlution

macrumors regular
Original poster
Dec 13, 2011
202
48
I've always suspected it but today I found out that it's faster to charge my iPhone 7Plus via my MacBook Pro USB 3 port than with the provided charger (10W vs 5W). I don't know if this is true for older iPhone model as well.

It just seems weird that Apple doesn't include a 10W charger in the box. I've barely used my iPhone 5W charger at all, instead charging it via my iPad charger unless I need to charge both at the same time.
 

Shanghaichica

macrumors G4
Apr 8, 2013
11,931
8,605
UK
I don't know which is faster because I never charge my iPhone with my MacBook.

I've 3 of the iPad sized chargers, so I just use one of those to charge my iPhone and it charges up pretty quickly.
 
  • Like
Reactions: jf1450

Azzin

macrumors 601
Jun 23, 2010
4,254
1,646
London, England.
I'm pretty sure all iPhones after and including the 6 have the ability to charge faster when using an iPad 10/12w charger.

People used to swear their 5s charged faster too, until people pointed out it was pure placebo, as the phone didn't have the necessary hardware inside to draw higher currents!
 

Mlrollin91

macrumors G5
Nov 20, 2008
13,535
9,080
Ventura County
I've always suspected it but today I found out that it's faster to charge my iPhone 7Plus via my MacBook Pro USB 3 port than with the provided charger (10W vs 5W). I don't know if this is true for older iPhone model as well.

It just seems weird that Apple doesn't include a 10W charger in the box. I've barely used my iPhone 5W charger at all, instead charging it via my iPad charger unless I need to charge both at the same time.
USB 3 will charge faster than a 5W charger, but charge slower than a 10W charger. My iPhone and iPad charge the fastest with a 10/12W brick.

Edit for typo.
 
Last edited:

Brandonjr36

macrumors 68000
Sep 12, 2016
1,621
556
Joplin
My car charger charges faster then the 5w it came with. But I really only plug my phone in at night for the most part so it doesn't really bother me how long it takes. But for people that charges all the time, hopefully they add a 10w or some type of fast charger on the next iPhones.
 
  • Like
Reactions: edlex

HEK

macrumors 68040
Sep 24, 2013
3,454
5,959
US Eastern time zone
I'm pretty sure all iPhones after and including the 6 have the ability to charge faster when using an iPad 10/12w charger.

People used to swear their 5s charged faster too, until people pointed out it was pure placebo, as the phone didn't have the necessary hardware inside to draw higher currents!
It's not a placebo effect. What it is is not taking into account everything you are doing while charging. The 5s did charge faster because the ipad power adapters have enough wattage to both charge and run the phone at same time without reducing the amount of charge current going to battery.

If you turn phone off and charge you won't see any difference in charge time from the 5 watt power adapter to the 10 or 12 watt ipad power adapter.

If you have phone on, radios are working using current, display may be on, and if you are doing some processor intensive function, most of the current from the 5 watt power adapter is going to run the phone. leaving very little to charge the battery.

By using the ipad power adapters you could get as much wattage going to the charge circuit as possible for that phone. It's true it would not charge faster than components allowed. But it did charge faster than what was left available to charge when being used.

The current phones allow using more wattage for charging such that I see almost, but not quit, half the time to charge using a higher cpacity power adapter.
 

terraphantm

macrumors 68040
Jun 27, 2009
3,742
557
Pennsylvania
It's not a placebo effect. What it is is not taking into account everything you are doing while charging. The 5s did charge faster because the ipad power adapters have enough wattage to both charge and run the phone at same time without reducing the amount of charge current going to battery.

If you turn phone off and charge you won't see any difference in charge time from the 5 watt power adapter to the 10 or 12 watt ipad power adapter.

If you have phone on, radios are working using current, display may be on, and if you are doing some processor intensive function, most of the current from the 5 watt power adapter is going to run the phone. leaving very little to charge the battery.

By using the ipad power adapters you could get as much wattage going to the charge circuit as possible for that phone. It's true it would not charge faster than components allowed. But it did charge faster than what was left available to charge when being used.

The current phones allow using more wattage for charging such that I see almost, but not quit, half the time to charge using a higher cpacity power adapter.
It's been tested. The 5S and earlier will never draw more than 5W from a power adapter regardless of what the load is.
 

HEK

macrumors 68040
Sep 24, 2013
3,454
5,959
US Eastern time zone
It's been tested. The 5S and earlier will never draw more than 5W from a power adapter regardless of what the load is.
Still don't get it. If you are using three watts to run the phone, it only leaves 2 watts going to recharge battery.

If you use a larger power adapter than you have a reserve such that the battery charging circuit gets it's 5 watts even as the phone screen and radios may draw their own wattage requirements. I had the 5s and saw that when i was using the phone while charging the rate of charge was faster when i used the ipad power adapters. If the phone was turned off it made no difference.
 

Azzin

macrumors 601
Jun 23, 2010
4,254
1,646
London, England.
It's not a placebo effect. What it is is not taking into account everything you are doing while charging. The 5s did charge faster because the ipad power adapters have enough wattage to both charge and run the phone at same time without reducing the amount of charge current going to battery.

If you turn phone off and charge you won't see any difference in charge time from the 5 watt power adapter to the 10 or 12 watt ipad power adapter.

If you have phone on, radios are working using current, display may be on, and if you are doing some processor intensive function, most of the current from the 5 watt power adapter is going to run the phone. leaving very little to charge the battery.

By using the ipad power adapters you could get as much wattage going to the charge circuit as possible for that phone. It's true it would not charge faster than components allowed. But it did charge faster than what was left available to charge when being used.

The current phones allow using more wattage for charging such that I see almost, but not quit, half the time to charge using a higher cpacity power adapter.
You are simply wrong I'm afraid.

The 5S does not have the necessary hardware inside to draw a higher charge.

The end.
 
  • Like
Reactions: Mlrollin91

HEK

macrumors 68040
Sep 24, 2013
3,454
5,959
US Eastern time zone
You are simply wrong I'm afraid.

The 5S does not have the necessary hardware inside to draw a higher charge.

The end.
Still not saying it could charge at higher rate. Oh well, pointless really as years past the point i can try it again. Went to the 6, 6s and using the 7 now.
 
  • Like
Reactions: Hitrate

Neokiller309

macrumors member
Nov 15, 2011
32
11
I've always suspected it but today I found out that it's faster to charge my iPhone 7Plus via my MacBook Pro USB 3 port than with the provided charger (10W vs 5W). I don't know if this is true for older iPhone model as well.

It just seems weird that Apple doesn't include a 10W charger in the box. I've barely used my iPhone 5W charger at all, instead charging it via my iPad charger unless I need to charge both at the same time.
I always charge my phone from my laptop when I am out and on the go, because it not only charges faster, but because it can charge while the laptop is sleeping and closed, and barely drains the laptop battery. Saves from leaving charging cables and AC adapters everywhere.
 

C DM

macrumors Sandy Bridge
Oct 17, 2011
48,867
17,503
Still not saying it could charge at higher rate. Oh well, pointless really as years past the point i can try it again. Went to the 6, 6s and using the 7 now.
It sounds what the other user was saying was about how much can be drawn/accepted by the device, not really about hoe much can be used for charging. That if the device can't draw more than 5w then that's all it has to distribute between charging and working--meaning that if 2w are used for working then there aren't 5w that could still be used for charging (since that means being able to draw at least 7w), and just 3w are left for charging (as only 5w total can be drawn at most).
 

terraphantm

macrumors 68040
Jun 27, 2009
3,742
557
Pennsylvania
Still don't get it. If you are using three watts to run the phone, it only leaves 2 watts going to recharge battery.

If you use a larger power adapter than you have a reserve such that the battery charging circuit gets it's 5 watts even as the phone screen and radios may draw their own wattage requirements. I had the 5s and saw that when i was using the phone while charging the rate of charge was faster when i used the ipad power adapters. If the phone was turned off it made no difference.
The device itself won't draw more power regardless of how much power it's using. Any observations to the contrary are placebo. So yes, if the device is using 3 watts to do whatever it's doing, only 2 watts will be available to charge the phone. And if you manage to consume more than 5w, then the power will drop even while plugged in.

With the 6 and newer, that limit is about 10W
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.