I was making some updates to my MacBook, then shut it down for the weekend, or so I thought. After a busy week I was finally able to get back to using it again, but I noticed it wouldn't power up. When I plugged in the charger and hit the power button again the screen instantly came up, with my browser still open. I never shut it off and it had been asleep this whole time. Is the battery going to be ok? I'm charging it now and it seems ok but that about gave me a heart attack. Eeesh.