07 Turbo Si - Battery problem

Not sure if I need a new battery, but heres what it is. Alternator works great, but battery doesn't hold charge. Could be because something is draining it, all I know is that I leave my car for three or four hours and go to start it and it struggles to start electronically (fuel pump is a much lower pitch on prime than when battery is fully charged). I checked my amp and sub wiring, my ground was off on the amp so I fixed it. Remote wire and everything else is good, so either the ground is still somehow messed up or the battery is just bad. Any ideas?

Turned out my negative terminal was tightened soo much that it was overtightened and didn't fit over the battery terminal anymore. Bought a new one and replaced it, thicker wire and holds perfect :thumb: