Can't charge ipad - iPad Apple Tablets & eReaders

Apple support suggests several possibilities. The iPad may not be receiving sufficient power to charge it; some lower powered charging devices are lacking. The charger may not be Apple certified (as being adequate). Test an alternative charger. Or, the port may be dirty or damaged. Remove debris. Try another USB cable. Restart the device. Also, determine whether or not you have the latest ios operating system. If it still does not charge, contact Apple support for service.

For more detailed instructions: https://appletoolbox.com/ipad-air-charging-very-slowly-or-not-charging-fix/

Incorrect port part, Wrong polarity for wires connected to the port or poor connection of wires to the port.

Hello,

If you charge your iPad on a power adapter, the iPad should respond while charging, except if your iPad battery is so low the apps need more power to run.

If you charge your iPad on the USB port of your computer, it is normal you cannot use your apps as the iPad is not only in battery charging mode but also in synchronizing mode with iTunes in the computer. You should lose the habit to charge the iPad on the PC and use a dedicated power adapter instead, as dedicated power adapters charge the iPad battery 2 to 4 times faster than the USB port of most computers.
USB port power: 2.5 Watts in general (5 volt x 0.5 A = 2.5 Watts)
iPhone charger: 5 watts
iPad charger: 10 or 12 watts

To charge an iPad you have to connect the USB cable to iPad power adapter (12W in power and is bigger in size compared to iPhone's). If you connect it to iPhone power adapter you might see that the iPad is not charging, but will take a very long time to charge. The same goes with connecting directly to computer.

Also, there is always a chance that either your cable, or adapter or the iPad itself has gone bad.

To get Ipad to show as charging download Asus AiCharger from web and restart computer after install.Plug in usb from Ipad and should now show charging.

To get Ipad to show as charging download Asus AiCharger from web and restart computer after install.Plug in usb from Ipad and should now show charging http://event.asus.com/mb/2010/ai_charger/

There are many things you might be doing wrong but slow battery charge is a problem with the new iPad. The battery is actually a lot bigger than the iPad 2 which means it is going to take you much longer to charge.
Use the provided charger and don't charge from your computer. It is almost twice as slow to do it plugged into a computer. Charge it at night to give it the most time to charge as possible. I usually turn it off so programs don't run and slow down the charging speed. Every little bit helps.
I can help you with other things too if you ask.

USB hubs typically don't generate the 10 watts necessary to charge an iPad when it's connected to your computer. This basically means you can't use your laptop to recharge your iPad.

Apple recommends finding an AC outlet and using 10-watt power adapter that came with your iPad.

I request you to visit the below url for your query
http://support.apple.com/kb/TA44551

the ipad will charge with the charger that comes with it

if you want to charge it with the cpu you have to turn off the ipod before it will charge

Press and hold sleep /wake button

til it says slide to power off