The best solution is to plug the iPad into a power outlet using the adapter that came with the iPad. If you absolutely must charge using a PC, do not use the iPad while it is charging. This can result in the iPad not gaining enough power to actually charge or even losing more power than it is gaining.What does it mean when your iPad says not charging?
Your iPad says "not charging" because while it is receiving enough power from the charger to operate, it's not enough to charge the battery. This usually happens when a lower powered iPhone charger or a low powered USB port (such as those found in some laptops or cars) is plugged into the iPad.