I received my phone yesterday, first day it lasted for about seven hours with 20 percent left. Last night I charged it fully and today the batter does appear to last longer but thats also because i did all the battery energy saving tips.

I think there might be something to battery draining faster if you do not have good reception in your home. Mine constantly jumps from 2.5 to 3.5 in my house maybe that might be causing the battery to drain faster. Another possibility is my simcard is 5 years old. I will pick up a new sim later today or tomorrow and see.