I was just using my MBP just like any normal way, with 43% battery charged. Then all of a sudden it died, and when I powered up again, it tried to revive, then power off. Checked the battery status bottom of the MBP and it had 1 light on, and 1 flashing. Plugged in my magsafe, and started up fine, and now its charging the battery. But as soon as I unplug the magsafe, the MBP powers off after 0.5 of a second. Has anyone heard of this before?? I just had this MBP for two weeks!