Register FAQ / Rules Forum Spy Search Today's Posts Mark Forums Read
Go Back   MacRumors Forums > iPhone, iPod and iPad > iPhone > iPhone Accessories

Thread Tools Search this Thread Display Modes
Old Aug 21, 2011, 08:08 PM   #1
macrumors newbie
Join Date: Aug 2011
iPhone iPad Charging Voltages


I cut a USB cable and used a voltmeter to determine the charging voltage for an iPhone 3GS, iPod 2 and and iPad 2.

The USB port on Apple computers (MacPro and MacBook) put out 5.17 volts. Many of the third-party chargers from the far east (FE) put out 5.00 volts. When charging the iPhone, with the FE chargers I sometimes, but not always, get an error message indicating the the device is not compatible. This doesn't appear to be a problem with the iPod.

Both the Apple and FE iPhone chargers are rated at 1000mA (1 Amp). Apple's iPad chargers are rated at 5.1 V and 2.1 Amps.

Apple's iPhone chargers will charge the iPad, but very slowly because of the lower power rating.

Hope that this helps.

SyBB is offline   0 Reply With Quote
Old Aug 21, 2011, 08:11 PM   #2
macrumors G5
Intell's Avatar
Join Date: Jan 2010
Location: Inside
Here's a further examination of the charging mysteries of Apple iDevices:
Last edited by Intell; Yesterday at 10:24 AM.
Intell is offline   0 Reply With Quote

MacRumors Forums > iPhone, iPod and iPad > iPhone > iPhone Accessories

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
thread Thread Starter Forum Replies Last Post
an app lets iPhone in charge of internet connection in Time Capsule? talentsky iPhone Tips, Help and Troubleshooting 1 Nov 10, 2011 08:40 PM
[FREE - iPhone/iPad] AlexPanda HD is now FREE for a limited time! Lakoo iPhone and iPod touch Apps 0 Jun 21, 2011 11:28 PM
[FREE] Atom Playground for iPhone + iPad BlobbleGame iPhone and iPod touch Apps 0 Jun 17, 2011 08:33 PM
iPhone 4 CHARGING stalk mount car kit ehmyerson iPhone Accessories 5 Apr 7, 2011 07:41 PM
Free Mail Templates (e.g. for Christmas) for iPhone/iPad Mailer App mathematician iPhone and iPod touch Apps 2 Dec 20, 2010 04:21 PM

All times are GMT -5. The time now is 05:27 AM.

Mac Rumors | Mac | iPhone | iPhone Game Reviews | iPhone Apps

Mobile Version | Fixed | Fluid | Fluid HD
Copyright 2002-2013,, LLC