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Synergie

macrumors 6502a
Original poster
Jan 15, 2011
771
210
Halifax, Canada
Will it damage the iPhone??? Or will the iPhone only draw what it requires? I don't think it's USB-c capable anyway....

I'm travelling soon and have the 29 watt charger and lightning to USB-c cable for my iPad Pro 12.9. And to save bringing multiple chargers I want to just bring the one charger. I tried it last night on the iPhone and it charged no problem and was not even hot or anything so is it safe?
 

rzc16512

macrumors regular
Jun 3, 2015
168
85
Will it damage the iPhone??? Or will the iPhone only draw what it requires? I don't think it's USB-c capable anyway....

I'm travelling soon and have the 29 watt charger and lightning to USB-c cable for my iPad Pro 12.9. And to save bringing multiple chargers I want to just bring the one charger. I tried it last night on the iPhone and it charged no problem and was not even hot or anything so is it safe?
It won't. The iPhone only draws what it needs. In fact, it will charge your iPhone faster than the charger it came with. General rule is that you can use a higher capacity charger but you can go below the original capacity charger EX: Can't use iPhone charger to charge iPad but you can use iPad charger which is higher capacity on your iPhone.
 
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Superspeed500

macrumors regular
Jul 25, 2013
193
44
What's important to remember about the chargers is what Voltage they output, not the max current they output or the power, as long as the unit doesn't draw more power than the charger can output. Devices will always draw the current they need. No more and no less.
 
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HEK

macrumors 68040
Sep 24, 2013
3,547
6,079
US Eastern time zone
It won't. The iPhone only draws what it needs. In fact, it will charge your iPhone faster than the charger it came with. General rule is that you can use a higher capacity charger but you can go below the original capacity charger EX: Can't use iPhone charger to charge iPad but you can use iPad charger which is higher capacity on your iPhone.
If I have iPad in sleep I use the iPhone charger overnight. Charges iPad fine, just takes longer.
 

rigormortis

macrumors 68000
Jun 11, 2009
1,813
229
The iPhone 6s is limited to 2100 mw at 5v charge
You are required to install OS X El Capitan to be able to charge iPhone at this level using your computers USB ports

If you're running OS X Yosemite , then you only get 1000mw

The SE is still limited to 1000 mw
 

bniu

macrumors 65816
Mar 21, 2010
1,102
283
It won't. The iPhone only draws what it needs. In fact, it will charge your iPhone faster than the charger it came with. General rule is that you can use a higher capacity charger but you can go below the original capacity charger EX: Can't use iPhone charger to charge iPad but you can use iPad charger which is higher capacity on your iPhone.

Not quite. Any charger can charge any device. If you use a higher capacity charger, the device will draw what it needs. If you use a lower capacity charger, the device will only pull up to what the charger can output.

If you use a 5W charger on the 12.9" iPad Pro, it will take a LONG time to charge!
 

rzc16512

macrumors regular
Jun 3, 2015
168
85
Not quite. Any charger can charge any device. If you use a higher capacity charger, the device will draw what it needs. If you use a lower capacity charger, the device will only pull up to what the charger can output.

If you use a 5W charger on the 12.9" iPad Pro, it will take a LONG time to charge!
The explain why my iPad 1st generation would always say "Not Charging" when plugging into a small charger or my computer. Sometimes it still works but it's generally not advised to do that
 

C DM

macrumors Sandy Bridge
Oct 17, 2011
51,388
19,455
The explain why my iPad 1st generation would always say "Not Charging" when plugging into a small charger or my computer. Sometimes it still works but it's generally not advised to do that
It will work fine, just will take longer. Not advised perhaps from the point of view that it would take noticeably longer but not because it won't work or is bad in some way.
 

itsray

macrumors 6502
Jun 5, 2016
474
326
you can check apples site to see if the charger is under their compatible devices.
 
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