Download BetterBatteryStats and leave it overnight then check it to see what's causing the battery drain - should show that something is keeping the phone awake (wakelock) and thus draining the battery
El1te - can I suggest sotmax ROM instead of wanamlite?
v14 at the moment is still on XXELLA but there's a new version in the pipeline that'll be updated to XXEMA2
I've found it MUCH smoother and more responsive than wanamlite and the battery life (combined with the yank555 kernel (packaged with the ROM) is brilliant!
I know benchmarks mean nothing in the real world, but I got 17500+ with AnTuTu and 6800+ with Quadrant on sotmax and only ~1500/5400 on wanamlite - the figures are significantly different and I DO feel the difference between the two ROMs
Give it a try, the worst that'll happen is that you'll like it
(It's also fully compatible with JKay framework and JBDomination if you should want them both

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