Wireless and games

[Rivers]

I want to buy a new keyboard and a new mouse, the Logitech MX500 mouse and the Elite keyboard but there is something I need to know. If I buy the combo with the mouse and the keyboard I will save allot of money, but the combo is wireless. If someone have any experience with it please give me some advice.
I want to know if it is bad for games and how long the batteries will last?

[Skittles]

I used to have a wireless keyboard and mouse. Worked just fine. Batts lasted about 2-3 weeks with heavy use.  I don't remember the brand I had, sorry.

[Gixer]

I got a Logitech cordless mouse and keyboard. I got annoyed with the mouse as you use it all the time and the batteries always run out when you didn't want them too.  So now I have a wire mouse and cordless keyboard.  FYI I am still on the same set of Batteries in the keyboard that I put in it at christmas gone  ;D