And then you've either installed some app that keeps your phone constantly awake, or killed the battery immediately by discharging it to 0. That's the only 2 explanations.
Right now I'm 17h on battery at 50% remaining, and screen as the top discharge reason with 32%. My father, who doesn't use the same phone extensively, routinely charges it once in 2 days. You should have screwed up something really bad to cause this phone not to hold charge.
Sent from my C5502 using xda app-developers app