Hmmm…. suddenly both the PS3 Controllers I have are no longer working over the bluetooth connection. They work fine over USB but that does not allow for much distance from the console itself which will be awkward in most cases as it is placed near the television. Found some items on YouTube stating to use the reset button which you find on the bottom of the controller (small round hole next to screw placed in the middle), however just doing that didn’t fix it. After some trial and error found how I could reset them, and this is the order of what I’ve done to get them running again.

1) Turn on PS3, connect the controller with the USB cable.
2) Press the reset button on the bottom part of the controller for 5 seconds, it turns off immediately the five seconds came from YouTube not sure if really necessary.
3) Turn on the controller.
4) Disconnect USB cable, it will start flashing and then connects.

Hope this will help some of you guys struggling with the same issue.