Apple Portables: Battery may not show a full charge in Mac OS X

Some Apple portable computers (PowerBook G4, iBook, MacBook Pro, MacBook, and MacBook Air) may not show the battery as 100 percent charged in Mac OS X, even when the power adapter is connected. The battery may appear to stop charging between 93 percent and 99 percent. Note: PowerPC-based computers may stop charging between 95 and 99 percent; Intel-based computers may stop charging between 93 and 99 percent.