i just bought a Macbook Pro from Costco today. I got it home and was setting it up while it was plugged in. The battery indicator showed 100%. When I unplug it, it stayed on for about 15 mins then shut off. I plugged it back in and it says that the battery is at 0% and has the service battery indicator. Did I get a dud or is there some kind of calibration or update that needs to be done?