I've tried BetterBatteryStats, and it doesn't actually report anything out of the ordinary, other than the wifi wakelocks.
I actually tried to flash it and keep it completely clean without installing anything, and letting it sit around. My battery chart was just a steady downhill climb from 90% down to 30% in 18 idle hours - my N4 would drain about 5-10% in that time.
I wonder if you have something that just sits there and keep refreshing itself.
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