Thanks so much for the info. I just got back form an appointment from a mac genius. He ran a battery diagnostic to see how many charge cycles the battery has gone through. My particular battery has gone through around 600 cycles. He said if the battery was under 300 and not being recognized it might be considered for a replacement. I didn't ask if he would try a new battery to make sure that was the issue; I should have. I will just have to buy a new battery. They did however replace the face plate on my MacBook for free because of a few cracks on the edges. That is an awesome link for the batteries.