When your iPad says it’s not charging it might be lying to you. Some people say this is an Apple conspiracy to get customers to spend more money on Apple approved accessories. The issue with this theory is Apple includes the required charging accessories along with the iPad, so you are not forced to buy anything. So why does the iPad display this error message? When you are attempting to charge the iPad, a minimum level of power must enter the device, this level is set by Apple.
If your charging method does not provide this level then you will get the Not Charging error message. So why is the iPad not receiving enough power? This could be caused by many things, the most common is that you are using a non-genuine charger (Apple conspiracy warning) that may not be providing a high enough level of power or possibly the level of power being provided is fluctuating so that the iPad considers the power supply unreliable.
Another possible cause is that you are using an iPad Mini, iPhone or iPod charger, these devices require far less power than the full sized iPad and as a result their chargers provide much lower levels of power. Another possible reason is you are charging using a USB connection on a computer. The level of power provided by a USB connection varies, not only between computer manufactures but within the computer itself, USB connections on the rear of the computer will often provide more power than those on the front of the case.
The final possible reason is a hardware fault, although when Apple power cables are treated right they will last beyond the lifespan of the iPad or iPhone, if they are pulled out by the cable the connection can become loose, this means you may require a new Apple power cable. This is the bit that gets Apple haters all worked up, when you see the Not Charging error your device may actually still be charging.
Granted it is a misleading error message but if you are not using the iPad and it is in sleep mode it may still be charging, just at a much lower rate. If you then use the device the level of power the device receives may not be enough to both power the device and charge the battery. For more information about identifying which charger you should use with which device visit iPad Not Charging on iPad Repair Only.