Windows 7: Windows 7 Battery Issue

I have a Toshiba M505-S4940 that I bought a year and a half ago (Vista on it originally) and upgraded it to Windows 7 at the beginning of this year. I have never had an issue with this laptop and it's always gotten it's regular battery life when it's not charging. My laptop had a battery warning over the weekend that showed consider getting a new battry. I opened my laptop this afternoon and the warning went away. I have searched around and found this has been a pretty common issue and figured I would report it. Didn't really know where to though.