Welcome to Android Central! Is it plugged into a wall outlet or a computer USB port? USB ports don't always provide enough juice to charge a device adequately. Cables can fail as well, such that the charging part stops working while the data transfer part still works. That happened to me with a 3rd party cable.
Yes it was plugged into the wall, not the computer. I have done a factory reset, that did not help. I have also tried other chargers to see if that was the problem, its not! This tablet is only a couple of months old. I am very frustrated!