Battery drains and GM 2000 Grand AM dies while driving

Heyo everybody, thank you for any expert opinions I may find.

My Grand AM can hold power and will drive. However, while driving my battery light is on, and the car will eventually run out of power. The time I can drive for seems to be shortening.

It seems like an alternator issue, so I replaced my alternator. However even after replacing the new one, the issue is still happening.

I was having problems with my starter, the housing was broken. I didn’t have much money at the time, so I ziptied the housing in place, and it ran perfectly. I did this a couple months ago, I don’t know if this could be causing my problem now?

Finally, there’s the battery. I don’t know if a damaged battery could cause this? I’ve charged it quite a few times now and it seems to stop early while charging. Still, partsource says the battery tests fine, and I don’t know if a poor battery could cause this.

I don’t know what to check next. I would greatly appreciate if someone may have experience with this.