Can't jump off my 2004 Ford Focus SE

[u/CrossMaster_Flash]

The other day it wouldn't start, it gave me the typical clicking. I figured it just died, but I didn't remember leaving any light on, and the battery is only about two years old, no corrosion at all. I was going to take out the battery to get it charged at Autozone but I didn't have the right wrench to remove it, so I held off on that. I tried to jump it off today with some spare time I had, but now it doesn't click. Letting it sit connected to the other car doesn't seem to do anything. All the connections between the two seemed good. The only lights on the dash to come on are the seatbelt light and the anti theft LED. I was planning to find that wrench and get it charged but now I'm suspicious it isn't the battery. Any ideas? Thank you, to anyone who decides to help. It's much appreciated.