Why is my ps3 controller taking so long to charge?

I am not using it, only charging, and it's been about 2 hours!Why is my ps3 controller taking so long to charge?
their might be a fault in it, mabey you should take it back to the shops and enquier about itWhy is my ps3 controller taking so long to charge?
On their website it says that it can take longer than 2 hours. Go to that source website and read under the heading, ';PS3 Pad is Wireless.';

moles