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iPad 3 failing to charge from iMac usb port

G'day


I received my new iPad 3 in Oz some 10 hours ago, and immediately synced it with my old iPad 1 settings from my 2010 27" iMac


After the sync, the top right showed 'not charging'. I'm using the same 3rd party cable as I've used on my old iPad for over 6 months, no hassles.


I unplugged the cable, and re-inserted it. The iPad 3 showed as charging, and it filled for another 2% (to 93%) then the 'Not Charging' message showed again.


This happened several times, and in the end I used the wall charger, with success.


When the new iPad is down a bit, I'll try the wall charger with the 3rd party cable.


Any one else having charging hassles with an iPad 3 on an iMac?


Regards


Santa

iPad (3rd generation) Wi-Fi + 4G, iOS 5.1

Posted on Mar 16, 2012 3:39 AM

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Question marked as Best reply

Posted on Mar 16, 2012 3:42 AM

If this is happening with a 3rd party cable, does it also happen with the Apple supplied cable?

30 replies

Mar 16, 2012 4:18 AM in response to Brian Christmas

That is interesting that two from Oz have the issue of USB charging...wonder how many from the States will jump in as people start waking up or return from the Apple store.


Apple still says on the info pages that USB charging with the high power USB port, but with the finding that the unit charges off the wall they may want to argue about your USB port. Just have to wait and see what happens.


Did you try talking with Apple Support about this?

Mar 16, 2012 5:51 AM in response to Brian Christmas

The quickest way (and really the only way) to charge your iPad is with the included 10W USB Power Adapter. iPad will also charge, although more slowly, when attached to a computer with a high-power USB port (many recent Mac computers) or with an iPhone Power Adapter. When attached to a computer via a standard USB port (most PCs or older Mac computers) iPad will charge very slowly (but iPad indicates not charging). Make sure your computer is on while charging iPad via USB. If iPad is connected to a computer that’s turned off or is in sleep or standby mode, the iPad battery will continue to drain.


Apple recommends that once a month you let the iPad fully discharge & then recharge to 100%.


At this link http://www.tomshardware.com/reviews/galaxy-tab-android-tablet,3014-11.html , tests show that the iPad 2 battery will charge to 90% in 3 hours 1 minute. It will charge to 100% in 4 hours 2 minutes.


 Cheers, Tom 😉

Mar 16, 2012 6:04 AM in response to Brian Christmas

I have the same issue here. doesn't want to cahrge when syncing on my macbook pro while my ipad 1 has no problem with this. it say's "not charging". I charged it direct on the power socket using the plug but this is annoying if it will not charge on ur usb powered device. can someone please check if there is an issue or is anyone else have the same problem. I'm from Sydney, I bought mine at Myer, Parramatta.

Mar 16, 2012 6:43 AM in response to kla80t

Welcome to Apple Support Communities.


Read The Finely-crafted Manual!

User uploaded file

Page 22 in the US pdf version, called Battery, and under that heading, Charging the Battery

User uploaded file

Here's the US link, but I'm sure if you poke around a bit on your home-country Apple site, you'll find a similar link: http://manuals.info.apple.com/en_US/iPad_User_Guide.pdf


'Not Charging' IS the expected behavior when you connect an iPad 2 or 'the new iPad' to a 'standard' 500 milliamp-spec USB port.


It takes a lot of battery capacity to run the new display with 4x the pixels of the iPad 2 and a quad-core processor, for up to 10 hours.


The battery in 'The new iPad' is approximately 42 watt-hours, nearly 70% more capacity than the iPad 2. The iPad 2 exhibits the same behavior, by the way, and has a 25 watt-hour battery.


http://www.apple.com/ipad/specs/


http://www.apple.com/ipad/ipad-2/specs.html


http://arstechnica.com/apple/news/2012/03/ipad-3-teardown-my-god-its-full-of-lit hium-ions.ars


http://support.apple.com/kb/HT4060


Message was edited by: kostby

Mar 16, 2012 9:54 AM in response to Markg0077

Markg0077 wrote:


I just received my New iPad and it is showing it is charging, but there is no progress in the battery filling up.


Have done a hard restart and it is plugged in woth the supplied power souce. VERY CONCERNING.


Chill. Give it some time to update. You're throwing a lot of stuff at this poor iPad all at once. Just make sure you are using the 10W charger and not a usb port on your computer.

Mar 16, 2012 10:04 AM in response to Tgara

ya, patience is needed withthe new battery - it is charging REALLY slowly. I am indeed using the charger supplied with the product.


Just read how massive the battery is. “I’ll say this: Apple works many miracles, but the company is still bound by at least a few technological realities. So just charge your iPad overnight, and give Apple props for keeping your hands nice and toasty.”



http://appadvice.com/appnn/2012/03/new-ipad-battery-takes-twice-as-long-to-charg e-may-also-run-warm

Mar 16, 2012 7:36 PM in response to kostby

G'day Kostby.


If you read my post, I'm plugging into a mid/late 2010 27" iMac.


That model has high powered usb ports, not lousy usb standard ports.


The iPad, according to Apples website, should be charging.


Quote: Charging via power adapter or USB to computer system.


http://preview.tinyurl.com/8a7kbh9


I've lodged a hardware bug with Apple.


Regards.


Santa

Mar 16, 2012 8:56 PM in response to Brian Christmas

An update.


I've had success at last. Turns out the iPad 3 must be asleep to slowly charge.


When asleep, it charges at about 9-10% per hour. This of course means the draw on the battery when awake is roughly equal to the charger input, so it doesn't charge.


Bit of a bummer really, I'm used to using my old iPad while it charges on my iMac, at my desk.


Regards


Santa

iPad 3 failing to charge from iMac usb port

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