A few chargers have been reported as defective. Tkae your charger, cable & iPad to an Apple store for evaluation. If defective you'll get a replacement. Make sure the 30-pin connector is fully seated.
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 (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
Prolong battery lifespan for iPad / iPad 2 / iPad 3: charging tips
I not sure what the problem is but my NEW IPad is not charging from either the wall outlet or a computer. I know that Apple needs to fix this problem and fix it quick. There is no need to have an IPad if you can't charge it back up. And by the way I was on the phone with Apple support not a few minutes ago, told them the problem. Got a "could you hold on please", then got cut off. I've been waiting for a call back,(because I know they have my number) but no call back as of 15 minutes now. I'm starting to lose faith in Apple products not so much the primary hardware and software but the supporting hardware. The quality is not there, I've seen so many USB wires to my iphone break it's not even funny anymore. Call back Apple!!!!
My brand new iPad is not charging when plugged into a wall socket. It was plugged in for four hours yesterday and only went up 20 percent then immediately discharged after using it for about 30 minutes. It has been plugged into the wall today for one hour and has Grone from 4 percent to 8 percent. This is
Bogus. I reset, restarted, etc.. Cn't even locate the firmware settings on .this thing. It is kind of a piece of junk considering the ridiculously high price. Of course my MacBook air is fantastic and the battery lasts for a verbs Long time and it charges up super super fast. This not charging issues make the iPad useless and I will return it if I cannot fix it myself today. The first week it charged up just fine. A little slow, but manageable. But now it is unworkable. Obviously we use the iPad instead of a computer when we are away from the office, so it needs to charge up. Duh. And no way am I going to suffer through genius debacle at an apple store. That is a mob scene and they are always rude and obnoxious. Alas. Apple has had terrible customer service for at least 15 years now. Very sad because prior to that is was the best. Good luck peeps. If anyone figures out how to tweak the firmware, or another fix, please post here.
Skydiver, that is a nice idea but I would rather be boiled alive in hot oil rather than deal with the geniuses at the apple store. Apple has the worst customer service on the planet. Just calling their techs geniuses is enough to make me vomit. Anyway, The stores are mobbed and the employees are overworked and the geniuses are snotty probably because they hate their jobs at apple. If I can't reset the firmware myself, then I will dump the iPad because it is a worthless battle having an electronic device that you cannot fix yourself. Thanks though. The multiple resets seem to have improved the charging a little bit. But it is still very slow.
My poblem is my iPad charges (very slowy) from the computer but NOT at all from the 10W plug in charger after a couple of days of use. Since purchasing it I have returned two of them and know are on my thrid unit which has just done the same thing.
Apple seems to have a very real problem here and if they cannot fix it - I'm dumping this dud.
I had the same problem just yesterday, I had my iPad charging the whole night and when I picked it up to leave it was at 55% which was less than when I went to bed at seventy something percent. I kept trying the whole day in different outlets around the house I even tried my brother's charger (also an iPad charger) and nothing happened. I did try to turn it off and charge it that way but the only thing that happened as soon as I plugged it in was that it would turn back on but not charge.
The charger that came with my iPad seemed to be working on my brother's iPad and my old iPod but not on my iPad, so I set up an appointment with the Genius Bar at the Apple store and I waited for about 20 minutes until a technician was available and when he sat down and plugged it in with MY charger it seemed to be charging just fine. He used a spectroscope to peer into the power jack and said one of the bars was bent. So he tried to unbend it as much as possible and when I got home it was charging.
I used my iPad for the rest of the day. Later that night when I went back to charge it, it wasn't charging again and I was very careful when plugging it in and unplugging it so as to not bend anything else. I don't understand why it did charge as soon as the technician plugged it in even before he did anything to it, and after when I took it home as well but not later that night nor has it been charging this morning. I'll have to take it back so they can take a look at it again.