i charge it bedside overnight, and that is it. If I make a ton of phone calls, it might by die by 7pm. I find it about the same as any other smartphone besides my old Blackberry which could go two days before needing charging. With Windows Phones, because of the strict guidelines, most of the phones are pretty much the same. Phones with bigger screens will not last as long. I am pretty sure the 8s will have better battery life because of the smaller screen. Have you looked at the battery size?