Touchscreen erratic while charging through power adapter

Hi, I have iPhone 4. When I charge my iPhone using power adapter, the touch screen behaves erratically -- e.g. when I press 3 on numpad, 9 may get typed or if I am on homescreen, and I tap on an application, a different app starts off. The phone works perfectly fine when charging thru my laptop's USB port.
Any suggestions -- is the power adapter faulty or is there some hardware problem?
Thanks
Sumit

After discovering that my partner's charger is fine and does not do this, I went to Apple Store to complain about faulty charger. turns out it was a cheap Chinese replica that came with my second-hand iPhone when I purchased it through eBay!!! Still the Apple Store had a quality spare and gave this to me for the inconvenience. How kind is that? Thank you Apple!
Now all problems solved. Happy Henk!

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Problem description:
My iPod photo won't charge using the power adapter from Apple. Bought a second one won't work, used different cables won't work either.
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Hi,
I used to charge my iPhone 4 via USB Chord using my laptop only. But recently I shifted to charging it through the power adaptor which comes along the Apple iPhone 4. But during charging, my touchscreen acts weirdly, I touch somthing and some other app opens.. I cant even unlock it during charging..
I am using the Official Apple Power Adaptor and the Official Apple iPhone 4 USB Chord which comes inside the box along with Apple iPhone 4.
I even tried charging my iPhone 4 with Official Apple Power Adaptor BUT WITH the USB Chord of Apple iPod Classic also. But the problem still persists..
I have tried charging my iPhone with its cover on and even without its cover on.. But no relief..
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I am having the same issue on my iPhone 4S. While charging, the touch screen will perform wildly inaccurately. I will touch one spot on the screen and an entirely different section of the screen will react.
I bought this in to the apple store and got my phone replaced under warranty.
Still, my new phone is having the exact same problem. This is incredibly frustrating, especially b/c I try not to charge my battery until it is very low (as you should with LI batteries). This often means I'm charging my phone during the work day and cannot use it b/c of the screen issue.
Could it be a software issue since I am experiencing this on two different phones?

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What I mean is that if it's plugged in all the time while playing it (on my stereo), is the battery being used (charger) anyway or is it directly getting the power from the power adapter therefore not using the battery therefore not using/draining the battery cycle (as a battery as a limited number of cycles in it's life). Perhaps it's not a charger/adapter thing but a Ipod Touch conception thing. If I use 24h a day the adapter, am I using the battery cycle or not? Who can answer me this for sure (Apple?)?
Also on a similar note, can I connect the Ipod touch on another PC to charge it (through the dock/USB cable) but without synching it (I know only one PC can synch but if I want to recharge the Ipod at my girlfriend's place on her PC without Itunes can I?)
Message was edited by: Macfisto
Message was edited by: Macfisto

Anyone else has an idea on the issue of if the Ipod touch uses the power adapter/charger as direct source of power and not through the battery? If the battery is now fully charged and the Ipod is playing (and plugged in) is only the adapter working or is also the battery?
remember the good old days when electronics could work with the adapter or the batteries of the time (non-lithium). If you didn't have a battery in it would work. Even if you did have a battery in, the adapter would be the source. I currently have a 20g Iriver and it displays a "plug" symbol when plugged in and playing and not the battery symbol which lets me to believe the battery is not being used.
I am concerned that if a lithium battery as lifetime of 500 cycles for example, and I use 5 hours a day the player (plugged in all the time) that 1 cycle will be done within 5 days even though I wasn't actually away from the power outlet. Of course I will use my Touch often away as well but overall by using 2h a day away and 3h a day plugged in, if it's the battery working all the time, my battery lifetime will be decreased by a lot.
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Recalling another similar thread, I can recommend you thoroughly clean the male and female MagSafe connectors. The gold pins and pads must be shiny bright and totally debris free. Use a Q-Tip moistened with alcohol, disconnect the power brick beforehand. Also, make sure the rubberized area around the connector in the Mac, where the magnet lies and the steel ring around the cable connector nestles, is completely free of anything that can prevent the two from fully mating and ensuring a tight grip. Here's more info, look at the pics on #7: http://support.apple.com/kb/TS1713 (click on the triangles to have them drop and show the pictures)

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Try this first - Reset the iPad by holding down on the Sleep and Home buttons at the same time for about 10-15 seconds until the Apple Logo appears - ignore the red slider - let go of the buttons. (This is equivalent to rebooting your computer.)
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How to Calibrate Your Mac, iPhone, or iPad Battery
http://www.macblend.com/how-to-calibrate-your-mac-iphone-or-ipad-battery/
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http://allthingsd.com/20120327/apple-ipad-battery-nothing-to-get-charged-up-abou t/
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http://www.macrumors.com/2012/03/27/apple-explains-new-ipads-continued-charging- beyond-100-battery-level/
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https://discussions.apple.com/thread/3921324?tstart=30
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http://www.pcworld.com/article/252326/new_ipad_slow_to_recharge_barely_charges_d uring_use.html
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http://www.ilounge.com/index.php/articles/comments/best-practices-for-ipad-batte ry-charging/
Tips About Charging for New iPad 3
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https://discussions.apple.com/thread/4480944?tstart=0
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http://thehowto.wikidot.com/prolong-battery-lifespan-for-ipad
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http://support.apple.com/kb/HT4327
Install and use Battery Doctor HD
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To Extend a Device’s Battery Life, Get to Know It Better
http://tinyurl.com/b67c7xz
iPad Battery Replacement
http://www.apple.com/batteries/replacements.html
In rare instances when using the Camera Connection Kit, you may notice that iPad does not charge after using the Camera Connection Kit. Disconnecting and reconnecting the iPad from the charger will resolve this issue.
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Touchscreen erratic while charging through power adapter

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