Microsoft Wireless Optical Mouse

Just posting to say that I had to replace the batteries in my mouse today. I am very impressed though since this is the first time ever doing so. When I first bought the mouse, I worried since it wasn't a rechargeable model. Yet, it was advertised that it would last 6 months on a pair of AA's. I figured that was average usage and a bit exaggerated, so I only expected 3-4 months of usage. But, I bought the mouse in the beginning of December, so it's been over seven months on one pair of batteries. And that is with me being on the computer all the time. It's pretty impressive since the LED's on the bottom never shut off and are fairly bright.