OR.... You might have left the key in the Accessory position all night. Draws 5 amps in that position.

SF

 

Or perhaps the alternator is no good. Or the serpentine tensioner is no good. Or the serpentine belt is too long.

 

... you most likely have something left on and or like oldblue said an accessory or a short is draining it.

If you can't completely describe the symptoms and are unable to do any self diagnosis with a volt meter or test light, this thread is unlikely to help you.
My recent battery replacement didn't change anything of my HHR operations.
Radio is definitely a problem and most likely related to door chime (right now doesn't ring) front speakers only the tweeters work very lightly.

Anyway right now my latest dis-repair irritation is the climate control door flapping on start up. I can feel it above the cabin air filter. Engine runs rough on start-up then clears up. I'm going for the easy route look for vacuum leaks and the obvious first. Then go deeper. There is a process to a proper repair sequence that will produce results on most any troubles.
Good day!

 

Your speakers have shorted, get new speakers. Yes, all 4 at the same time, Yes, only the tweeter works. There are hundreds of posts on the subject. Don't waste your time reinventing the wheel.

Clean the throttle body, inspect the timing chain, inspect the EVAP purge valve (normally closed), test the fuel pump

Climate control doors are replaceable and a fairly common problem.

 

How would you do this when the key is taken out when you exit the car ?

 

OP never said that the key was removed.

 

Ran thru this again and didn't see anything about the key.
Correct me on this.
Thanks

 

Never mentioned, one way or the other. Can't assUme anything.

 

Unless OP comes back with some information, we really don't know much about the issue. Perhaps the headlights are being left on.

 

Or a short in the soy based wiring harness, from rodent activity! I know, eeeewwwwwww! Mice!