Is the battery gauge on my PowerBook G4 accurate? Any battery I use seems to hover between 97-99% charged, and only ever shows 100% when I am charging a drained battery. Once it's charged, the percentage goes to 99 or 98. My concern is how can I tell if I am getting the most juice from my batteries, and is that percentage accurate? Is there some 3rd party utility or something that can give me a better idea on my battery's life?