You are seeing excatly what Apple states can happen if you try to charge your iPad - any model/version of the iPad - using a USB port on your computer. This is copied from Apple's article about the iPad battery.
There is nothing wrong with the way that your iPad is charging.
The quickest way to charge your iPad is with the included USB Power Adapter. iPad will also charge, although more slowly, when attached to a computer with a high-power USB port. When attached to a computer via a standard USB port (most PCs or older Mac computers) iPad will charge, but only when it's in sleep mode. 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.
The quickest way (and really the only way) to charge your iPad is with the included 10W or 12W 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 (5W). 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%.
How to Calibrate Your Mac, iPhone, or iPad Battery
At this link http://www.tomshardware.com/reviews/galaxy-tab-android-tablet,3014-11.html , tests show that the iPad 2 battery (25 watt-hours) will charge to 90% in 3 hours 1 minute. It will charge to 100% in 4 hours 2 minutes. The new iPad has a larger capacity battery (42 watt-hours), so using the 10W charger will obviously take longer. If you are using your iPad while charging, it will take even longer. It's best to turn your new iPad OFF and charge over night. Also look at The iPad's charging challenge explained http://www.macworld.com/article/1150356/ipadcharging.html
Also, if you have a 3rd generation iPad, look at
Apple: iPad Battery Nothing to Get Charged Up About
Apple Explains New iPad's Continued Charging Beyond 100% Battery Level
New iPad Takes Much Longer to Charge Than iPad 2
Apple Batteries - iPad http://www.apple.com/batteries/ipad.html
Extend iPad Battery Life (Look at pjl123 comment)
New iPad Slow to Recharge, Barely Charges During Use
Tips About Charging for New iPad 3
How to Save and Prolong the battery life of your new ipad
Prolong battery lifespan for iPad / iPad 2 / iPad 3: charging tips
iPhone, iPod, Using the iPad Charger
Install and use Battery Doctor HD
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.
Like Diavonex said it takes more power to charge the iPad even the mini. If you use the USB on a Mac it has enough power to charge an iPad. However every none Apple PC I have plugged any of my iPad's into they don't have enough power to show that it is charging and takes a very very long time to charge them.
I'm on my fourth iPad. 1,2,3 and mini. All have had same charging problems. Varying speeds of filling up. I've always used the correct "matching" apple cables for all. Have plugged into walls, USB"s and car. Completely irregular responses from one device to another, and even get differing responses from the same outlet at different times. All the nonsense apple puts out there about using a stronger charging USB, or not using wall outlets, or using certain outlets, I believe is a diversion from what they really know to be true: they can't figure out why devices charge at different speeds. Does anyone else get irritated that apple protocol is that they DO NOT answer us if they don't want to? All of these comment blogs are just that: civilians commenting on what they believe to be true. And we have to hunt through huge numbers of blogs and commentaries to even get near an answer! With all due respect to you heavy-hitting top notch responders out there, thank you! We'd be totally in the dark without you guys. But I've got so many dollars invested in apple product, as do so many users, you'd think they would offer the courtesy of answering users questions head-on, directly, rapidly and in a straightforward, easy to locate site. It's insulting that they do not take better care of us. Yes we can call into express support for many issues, but they would not be of any help on this charging thing. What will they do? Recommend that we plug it into a different outlet and wait with us on phone for results? Silly! Whenever there's an issue about potential bugs in devices, apple support just goes away leaving all of us to guess! Why do I keep giving them my money? !!!!! Because I'm in so Mac-deep, I can't imagine converting everything to non Mac environment without losing my mind! I really wish a bonafide apple support person would take on the challenge of answering why we cannot get effective consistent charging for iPads!
Does that Asus Ai charger tool work on non-Asus boards?
I am also very annoyed that I cannot charge my Mini on ANY of my computers. What a ridiculous notion that I must have separate charging and usage sessions (I use my Mini WITH my PC).
Perhaps I can find a way to wirelessly interface to my Mini?
BUT I can confirm that even though the Mini states, "Not Charging", next to the battery symbol... it will trickle charge (very slow) IF the Mini is asleep. Better than nothing, I suppose.
This is obviously a design flaw. Please AFB's stop making excuses for Apple.
Yes, Asus Ai Charger works on non-Asus PC brands!
I'm using it on 6 laptops (1x Compaq, 2x Toshiba, 2x Sony Vaio, 1x DELL).
I've been using it since released, and I've never experienced any issue with it.
Weeks ago, I plugged in my iPad mini, trying to sync it with iTunes, and I found out that the iPad was charging normally !
I don't know if Apple did something on the recent updates on this thing, but I'm really happy, finally I can charge my iPad mini from my laptop !
I have an iPad mini. It is my only Apple device. Before retiring, I had been in the computer field for ~21 years, first as a database developer in the pre-Win DOS days, (ah... the stress-free computer days, pre Windows - though my first system was an Apple III, (THE hot-rod Apple IIe, and the last good computer, IMHO, but I digress...).
I spent the last 14 years of my 21 years as an independent ; built my own systems,installed & managed networks, etc, etc. I tried three different times to integrate Mac systems into PC networks because I would occasionally have a client request such a connection. I bought three different Macs over about ten years and killed all of them within 3-4 days, just noodling around in the OS, trying to get acquainted; doing what I have always done on PC's: change icons, customize UI, nothing very brave since I didn't know the OS. None of the systems ever ran right again after I got the first 'bomb' message.
Needless to say, though I will say it, I don't have a high opinion of Mac products and my limited exposure to 'i' products have not changed it much.
To the subject; I finally replaced my dead cable Internet router and got a wireless version. I only did this because I had tried to connect the iPad to my laptop for data transfer only to find out it wouldn't. Then I tried to connect the iPad to an Xfinity hotspot and couldn't get connected to it. I sat down tonight to connect the iPad to my new wireless router and also to charge the iPad.
I couldn't get connected to the wireless, but surprise, the iPad found and connected to Xfinity. Then I noticed the iPad was displaying a Not Charging message.
This was strange because I got this laptop last year just before I officially became 'bi-coastal'. My wife took a job in NY, (our home is in Oregon), several years ago while we were in the 5th year of an 8 year lawsuit with a criminal enterprise masquerading as a mortgage company and we were running out of money to may attorneys. Since the lawsuit ended last Spring, (they surrendered!), I embarked on my first three month stay in NY with a laptop in hand. (Three months in NY, three months in Oregon is my life for the foreseeable future for those keeping score).
My wife had won the iPad Mini at work and it was sitting idle in a drawer. I decided to adopt it and used THIS laptop to charge it from then on, so I am very puzzled it now is saying it is 'Not Charging'.
It trying to figure out why it is not charging, I found this thread and several others on the subject of 'iPad not charging'. What I learned was it actually is charging, just slowly. I guess to Apple if it's not charging at the most optimal rate, then it is not charging; kinda the same the mentality that causes a new product version to be brought out each Fall and people flock to it, even though the present model s working just fine, but there's my digression tendency, again.
Now, I read on this thread a solution to the non-charging, (or at least the spurious message issue), is to download and install Asus Ai Charger. AS I WAS DOWNLOADING it, I read another post related to iPad non-charging and IT GAVE ME PAUSE.
Read it here, yourself:
Why Apple Couldn’t Go to Micro USB Charging
WHAT GAVE ME PAUSE was the statement: "Here’s the problem: The micro USB pins are very small, and the power-carrying connectors, pins 1 and 5, are rated to carry 1.8 amps at 5 volts DC. That means that the maximum charging power that can safely flow across the connector is 9 watts. But the iPad wants 10 watts to charge"
The author is specifically speaking about micro USB, so I am curious if full size USB has the same amp specs. Here's a quote regarding USB 2.0 & 3.0: "USB 2.0 standard allowed 0.5 Amps originally, but they revised it to keep up with the higher battery capacities that had to be charged with microUSB. USB 3.0 standard allows up to 5 Amps." (Wrong, wrong, wrong: USB 3.0 only supports 0.9 amps, v 3.1 supports up to 3.0 amps, see link below)
So, check to see if you have USB 2.0 or USB 3.0 ports, 'cause you ain't gonna get faster charging from Ai Charger if it's a v.2.0 USB port. What you might get is, 'magic smoke'. (a common technical term in the electronics field.) It's magic because it instantly renders any device emitting it DEAD.
Ai Charger may well get rid of the 'Not Charging' message, but if it does something to up the charge rate of a USB not capable of it, then it's not so good. BEWARE.
Something else: get the shortest cable possible for charging. Wire absorbs amperage, it's the nature of the beast. Granted, the wires in a USB cable are teeny, but we're also not talking about much amperage. A drop of .1 amp is 20% of .5 amps, after all.
In looking for the amp specs of USB ports, I also found this article:
How USB charging works, or how to avoid blowing up your smartphone
This article is more up expansive and contradicts some of my worries, but that's also the nature of the computer world. This article is also responsible for the edit in the quote above about USB 2.0 & 3.0.
A technical note: volts x amps = watts. (Watt's Law) don't get your amps and watts mixed up or you might get 'magic smoke'.
Confused? Join the crowd. As for me, I'm retired, I'm in no hurry about anything, and after three marriages over 40 years time, I find it very easy to ignore spurious messages, but there I go, digressing again.