So I found the solution for the problem
It was due to my usb port problem in my phone...once I used another phone charger to charge my phone. .. from then I was getting very slow charging nd no usb detection
.. then i slightly inserted a metal strip and slightly forced the usb jack upward.... and in seconds the problem is solved.......
Now I get my phone fully charged in just 2 hours.
I found this solution on xda for note2.
Plz support <press thanks>
Sent from my GT-I8552 using xda app-developers app