I tried a lot of roms(CM11, AOKP, Stock an now Purity) and kernels (AK, Faux, Piasek, Franco and now Matr1x), i tried also safe mode but the results are still the same.
Without Airplane mode (Wifi on (not good signal), Sync on) it drains about 25-30% during the same time.
I used BBS for wakelocks but i don't have important PWL.
I had a lot of KWL by msm_hsic_host and I resolved downgrading baseband from .098 to .048 and now .084.
The phone stays 99% of the time in deep sleep.
I also changed battery with a new one (spareslg.com) and the results are almost the same.
During the day I have 10-12h of battery with 3-4h of SOT.
What kind of problem I have? It's an hardware problem?
Thanks and sorry for my english.