HELP!!!

For the past few days my MacBook Pro has been shutting off immediately when I try to run it on battery power. The little battery icon says that the battery is fully charged and so does the little LED indicator meter on the battery itself. The Apple site offered some fixes but none seem to work. There are some certified Apple places in Seville, but I don't think I want to deal with the infamous Spanish efficiency a little over week before I go back home. I was really hoping to be able to do some work on the flight back. Any ideas?