I currently drive a 1999 Alero, recently I have noticed when I try to start my car it doesn’t start. I get a boost and it will crank but then in the morning I’ll need another boost.
Then get a boost and drive to the auto parts store where they can test your battery and charging system. They usually with do this for free and they generally do a good job. If you need a new battery, I suggest you buy it there, after all they just did you a favor.