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TheRekz Level 1 Level 1
I have an iPad 2 in which if I connect it to my PC it doesn't charge, but when I connect to my Mac it charges. It can sync and transfer files from my PC, detects the device on iTunes, but on my iPad it says not charging. What should I do?

PC, Windows 7
  • King_Penguin Level 10 Level 10
    expertise.itunes
    iTunes
    Most computers don't provide enough power via their USB ports to be able to charge the iPad (first or second version), though they may charge it slowly if the iPads screen is off. It's more reliable, and quicker, to use the wall charger.
  • lllaass Level 10 Level 10
    That is normal for PCs and older MAc computers. The ports on older Macs and a lot of PCs limit the current from USB ports to 1/2 amp. The wall charger supplied with the iPad outputs 2 amps. The PC will slowly charge your iPad with the iPad asleep when you can't see the screen.
  • TheRekz Level 1 Level 1
    Hmm...so then why is it that a desktop can't charge but a mac book pro can?
  • King_Penguin Level 10 Level 10
    expertise.itunes
    iTunes
    It'll depends partly on the age, and make, of the computer. The power requirements of the iPad are fairly high (which is why it's charger is twice as powerful as the iPhone), and the manual states +the best way to charge the iPad battery is to connect iPad to a power outlet using the included Dock Connector to USB Cable and 10W USB power adapter. When you connect iPad to a USB 2.0 port on a Mac with the Dock Connector to USB Cable, iPad may charge slowly while syncing.+
  • Lyssa Level 6 Level 6
    Because Apple has designed their computers to output the necessary amount of power to charge the iPad. PC manufacturers have not.

    ~Lyssa
  • Electricfx Level 1 Level 1
    I downloaded a patch for my Asus Laptop, that fixed this problem with my Asus laptop and my iPad 1. Not exactly sure how it works, but it did work like a charm. I ran the program and now it charges my iPad just fine. I have heard reports that it also works on other machines, but I can't confirm this as I've never tried it on another computer. So I guess do a search on Asus support, try your luck, and report back! Sorry I cant point you to it's exact location but it I downloaded it forever ago. Ill look when I get home.
  • Electricfx Level 1 Level 1
    Here's that link I promised. Lots of people report it works on other computers besides Asus. Let me know how you make out. Anthony

    http://event.asus.com/mb/2010/ai_charger/
  • mthamer Level 1 Level 1
    wow... downloaded patch work great on my Gateway POS
  • chcn Level 1 Level 1
    Thanks! This works great for me. I would advise caution though; some people have reported system instability issues with this, and it simply doesn't work for some. I'm using an ASUS motherboard and a fairly decent 550-watt power supply. I wouldn't try it on non-ASUS hardware or systems with small power supplies.

    See for example
    http://surana.wordpress.com/2010/09/15/asus-ai-charger-fails/
    http://vip.asus.com/forum/view.aspx?board_id=1&model=P7P55D-E+PRO&id=20100510082 821921&page=1&SLanguage=en-us
    http://vip.asus.com/forum/view.aspx?board_id=1&model=P8P67+DELUXE&id=20110218043 215769&page=1&SLanguage=en-us
  • chcn Level 1 Level 1
    Update: I spoke too soon. It seems to work reliably when connecting to a regular USB port, but when connecting a an external hub this little utility seems to make iTunes hang.
  • Slammer99uk Level 2 Level 2
    This patch works like a champ on my old Dell XPS 710. No issues with Itunes nor any other program.

    I would suggest trying it out. It loads a driver/prog called "AiChargerAP.exe" So if you experience issues, just unistall it.

    Jerry
  • chcn Level 1 Level 1
    I would strongly advise caution with respect to this program. After seeing that it seemed to exacerbate the freezing problem I was having with iTunes (see, for example, here: http://discussions.apple.com/thread.jspa?threadID=2782150), I decided to uninstall it.

    Well, running the uninstaller messed up my computer's USB drivers, leaving them unsigned! So suddenly I had no USB devices working, including my mouse. Using the keyboard controls (lots of Tab, Enter, Spacebar, etc.), I managed to use Windows System Restore to roll back to the point before I had ever installed the infernal thing in the first place.

    Software that can't properly uninstall itself and which possibly destablizes the system is not worth it.

    Besides, the iPad charges even at the regular rate, it just does so very slowly. Lithium batteries prefer slow anyway. And when you need fast, there's the wall charger.
  • chcn Level 1 Level 1
    Slammer99uk wrote:
    ... if you experience issues, just uninstall it.


    That's what I thought. But see above for my experience uninstalling it. Not so good. My system is back to normal now, and iTunes is working perfectly again too. Like I said, not worth the risk.

    I'll wait for a proper update to the drivers or the BIOS or whatever it is to officially support the high-power mode without this poorly-executed kludge.
  • Slammer99uk Level 2 Level 2
    Fair comments, for those that want to uninstall manually (and it sounds like a good idea to do so), delete this key in the registry, reboot and it will no longer load at startup:-

    HKEYLOCALMACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ASUS Ai Charger

    *The usual wavers apply to backing up the registry etc, If you do not know what you are doing with the Windows Registry, just steer clear of this driver and wait for an official patch*

    Jerry
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