Error 3 while trying to charge the battery.

The battery is not getting charged. It shows error 3 while trying to charge. I have tried to reset the program by simultaneously pressing the 2 buttons for over 10 seconds as recommended. The error 3 shows up when trying to charge.

The problem started after changing the battery. I was able to charge 3 or 4 times after changing the battery. I was advised to clean the contacts which I did but the error 3 still shows.