There's a nice post about making sense of the System Profiler battery information, especially when your battery isn't lasting as long as it should be
here
And let's see...
The Macbook Battery Problem announced end of April 2007. There's a chance you got one of the bad batch. That may be why you're getting the 'Check Battery' note. You might want to swing by
MacBook | Macbook Pro Battery Problem and have a read through. I know that as of 10/08 Apple continues to replace the affected batteries.