<human>: My boyfriend's MacBook Pro (2009 era) fell off of my bed yesterday while turned on. The only problem we could see was that for some reason the Internet and applications were running slower than usual, and the optical drive was acting wonky for a few minutes before fixing itself. 

The computer has worked all day today, until a half hour ago. 30 minutes before 11, I closed the laptop (which turns it off..?), put it into my laptop case backpack, slung it on my back, and walked about for a half hour, the backpack never leaving my back. I returned around 11 and opened the laptop, which usually turns it back on. No dice. The screen remained black. I tried pressing the power button. Nothing. Finally, I plug it in and press power and it turns on, but it gets stuck on the first screen (grey with grey apple logo) and the spinning thing for about 1 minute. Then it goes to a blue screen for a minute before bringing me to the log in screen. 

I log in and again it takes far longer than usual to bring up my desktop and icons, and the date and time are set to Sunday, Dec. 31 2000, 7pm. It is currently Wednesday, Feb. 11 2011, 11:37pm. Also, the battery status is "not charging," and when I click on it, it says "replace now," and that the computer is running on power directly from the cord. Nothing else. Before 11, the battery got 4 hours on a full charge, no problem. 

What the Hell happened, and can it be fixed?

Can you summarize the given text in a few sentences?
<bot>: Computer fell off bed, afterward is running slow but fine. Today, after having run the computer perfectly well for the past 24 hours, the battery suddenly stops working.