Microsoft Wireless Optical Desktop Receiver Wireless Optical Mouse Shuts Off?

Wireless optical mouse shuts off? - microsoft wireless optical desktop receiver

I have the Microsoft Wireless Optical Desktop 700th

the keyboard works fine, but the mouse (by 2 AAA batteries) batteries are switched off after a while (maybe 1 hour?). I can not get into once I have to leave the batteries and return to the Pop It was bad yesterday, I just restart the PC, connect the USB receiver, removing the battery and after a few trials and errors pressure on the port used by the mouse and receiver, while finally meet again ...

This mouse is a common problem (I have an old optical wireless and never had this problem and other problems, but this is not). It is to be a few days old and should be able to return, or a new exchange. My main question is, this mouse is a global problem or a problem with that mark only the mouse or the mouse is defective, you must return.