Depends on the phone, usage, etc. With mine, I'll get about 1+1/2 days with pretty heavy usage, Wifi, etc. Can stretch it to 2 if I don't use it too often. I charge every night anyways so it doesn't bother me. Unfortunately the days of getting 5 days out of a full charge is long gone and left behind with the old 3315 Nokia's. However what these phones do these days it's not surprising battery life isn't the same