I seem to get much better battery life when I'm at home where there is only my own wifi. At work, where there are multiple wifis, bluetooth devices everywhere, etc. I lose about 2-3% per hour even if I don't touch my phone. Next week I think I'll experiment with turning off wifi and bluetooth while at work to see what difference it makes.
It would be interesting to know how you have your phone configured (what is on/off, what apps installed) and what your everyday environment is like. I know you use the battery saver option (so do I) but what else?