The Lumia battery is definitely a curious puzzle. For my first week I was getting pretty terrible battery life no matter what apps I disables in the background. Disabling features or apps, nothing helped. It would always be dead before the end of the day.
Now I can keep everything enabled - LTE, tap+send, Bluetooth, all background apps (a LOT of them) - and even after browsing the web quite a bit, I still have 50-60% left at the end of the day. Today, having not used my phone much at all, it's still at 80%. I have Facebook installed, Skype installed, a Weather app is updating my lock screen, and more.
Only thing that uses up battery quickly is tethering my laptop to it, which understandably uses around 15-20% per hour (or more)
Those who are still having issues - have you updated all the Nokia settings pages through the store? I'm wondering if some of those fixed issues, because that's the only thing I can think that's changed....