Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

TallManNY

macrumors 601
Original poster
Nov 5, 2007
4,839
1,812
I often charge both my iPhone and iPad off of the iPad adapter plugged into a wall. That charges the iPhone very quickly (especially the first part to get it to about 70%). I know that the iPad adapter is a little more powerful. Could there by any problem with charging an iPhone with it?

I also sometimes trickle charge off of a USB hub plugged into my computer. That is a fairly slow process. So sometimes my iPhone is being force-fed energy and sometimes just a dribble. I haven't noticed any problems but I was wondering if there is any cause for concern.
 
No, there's no cause for concern. The iPad charger just allows the iphone to draw a little more current than it does from a 1 amp charger. Current isn't being force-fed into the phone.
 
Hmm, I remember reading in the MacBook forum that if you use the higher voltage (MacBook Pro) to charge MacBook Air, it would be fine, but if it's the other way around, then the MacBook Pro won't get enough voltage.
 
So I could get an iPad adapter and use it for my 4S with no problems? I don't own an iPad but if it's going to charge my iPhone faster without causing any problems then I don't see why not to get an iPad adapter.
 
So I could get an iPad adapter and use it for my 4S with no problems? I don't own an iPad but if it's going to charge my iPhone faster without causing any problems then I don't see why not to get an iPad adapter.

Yes, you could.
 
So I could get an iPad adapter and use it for my 4S with no problems? I don't own an iPad but if it's going to charge my iPhone faster without causing any problems then I don't see why not to get an iPad adapter.

Yes, you can use an iPad charger to charge an iPhone without any issues. It should charge it a bit faster as well.
 
I guess I'm going to get one in the next few days then.

But why doesn't Apple just give us the same adapter with iPhones if you're saying it'll be faster with no consequences?

Most likely due to manufacturing expense.
 
I guess I'm going to get one in the next few days then.

But why doesn't Apple just give us the same adapter with iPhones if you're saying it'll be faster with no consequences?

They are bigger, more expensive, and use more power. Plus they don't fit into the iPhone box with everything else.
 
It won't charge faster than what the device is capable of. It will charge faster than USB/500mA.

The iPhone is capable of charging at 1.5A. The iPhone's cube shaped charger outputs 1.0A. The iPad's 2A. The iPhone will benefit from the extra 0.5A.
 
Hmm, I remember reading in the MacBook forum that if you use the higher voltage (MacBook Pro) to charge MacBook Air, it would be fine, but if it's the other way around, then the MacBook Pro won't get enough voltage.

Higher Voltage is a problem. Higher Amperage at the same voltage is OK
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.