I got a new battery for my phone from ifixit and installed it. When I turned it on the phone said it was at full battery. I left it charging on a wall socket all night then left for work. When the battery fell to about 95% It would die. Plug it in and it will go back to 100% but then die again at 95%. I restored and updated (4.3.3) but the problem still exists. Is there a way to reset the battery memory? I really dont want to put the old (worn out) battery back in.

UPDATE:

I'd hate to return it. I already returned one because it didn't work. Does it ever work? I feel like I may have messed up my old battery taking it out. It is all bent now (not punctured).

Also, it seems to turn on after it turns off at the same battery percentage. for example it just turned off at 92% but then it turned back on with out plugging it in and it was still at 92%. Should I try to get it to 0% then charge?

UPDATE 2:

I took it all apart again and put it back together at well as I could. I tightened all screws as much as I could. After this the phone seemed like it would work. It worked for about 12 hours and now it will turn off pretty frequently (even if plugged in). It will turn back on after it goes off but sometimes it takes multiple tries. Should I return the battery?