It may be other problems, but the general rule is first to: 1. reset PRAM 2. reset power manager 3. calibrate battery There are KnowledgeBase articles at the Apple Support website which explain each of these for the different models of laptops. I'm using a temporary computer now so I can't give you the article numbers. > I'm new to this list. I have an IBook G3 (800 mhz) and the battery > icon seems to be acting up. My book shuts down when the battery shows > as much as 90% charge. At one time it was accurate, this has only > started within the last week or so. However, when I am recharging, the > icon reflects that accurately, as far as I can tell. Any thoughts > suggestions? Thanks in advance. Warren