Well . I'm looking for any advice you guys can give me regarding this issue. Whenever my battery reaches about 30%, my MBP suddenly shuts off. I've tried to boot up immediately afterward, but battery seems completely discharged. However, when I checked with system info, what seems to be discharged battery still shows that 30% of remaining mAh. I think this is due to dead cell recognized as live ones, or computer failing to recognize uncharged cells. Is there any fix on this? My better isn't covered by exchange program..