It's 12:30am, I get home from the movies, and realize I have to return some videos before noon tomorrow (I like to sleep in). So, literally 5 minutes after I come in, I get in my car and turn the key. Nothing. Not even a crank. Apparently the battery is dead. The headlights still work, so does the stereo, but I guess it doesn't have enough juice to crank the engine. I added some distilled water to the battery, because it was really low. The light inside the car got brighter, but still nothing. Do I just need a jump and let the alternator charge for a while, or is my battery dead?