The only time I had this problem and knew that everything was fully charged, was when my transmitter was not working correctly. I had to send it to Dogtra in California and it turned out there was a broken wire in the transmitter. There's a series of troubleshooting suggestions in the back of the owners manual. If you don't have a copy of the manual, you can call Etch-Mark. They've always been very helpful with me on the phone. Their phone number is 204-736-3012. I've always gotten a call back when I've left a message.