Battery keeps going down

Thanks a lot for your advice, and I will get them to check that as well tomorrow! :)

Electrical problem
2002 Chevy Malibu 6 cyl Two Wheel Drive Automatic 101000 miles

We have a 02 malibu that has been draining the battery after is sits a day or so. The battery and alternator are good I think the problem is the ground wire is too corroded and causing a short. My question is where does the other end of the neg cable bolt to? I trace it to the back of the starter motor but it seems tough to get to. Do I have to bolt it there or can I bolt it anywhere on the block? If I have to bolt it there are there any easy ways to get it there? Thanks

Thanks, so there is no other purpose for the negative cable to run down by the starter other than for grounding purposes? Or in other words the black is only ground

Battery went dead bought new one. System locked up, did the 10-minute reset it ran two days now just clicks.

Engine Performance problem
2005 Chevy Malibu 4 cyl Two Wheel Drive Automatic

My car has had starting issues for a couple of weeks and I figured it was the battery because I had to jump it twice to get it to work. Last night after getting my radiator replaced I drove the car home and when I tried to crank it again it stalled and then cut out after that it was clear the battery was drained after replacining the battery the car acts like it wants to turn over but doesn't. Any suggestions

I've replaced the battery, I've replaced the alternator. Driving the car with a brand new battery the battery only lasted forty five minutes before it died. I have extremely limited knowledge of vehicles everything I'm learning how to do on this car I'm learning on YouTube so please help. Could there be a short somewhere between the alternator and the battery? How do I tell if the alternator itself is even getting the correct amount of power?