Even without any tweaks u should be getting at least about 12h with heavy usage. Something must be wrong with ur battery or something went wrong while u flashed maybe.
Sent from my LG-P970 using xda premium
Mine's moderate usage on 3G and my battery drops quite fast - perhaps 3G's the factor because leaving it overnight the battery level doesn't drop badly
Zeus 7.06, Diana 2.7 maxUV kernel.(Now on ICS V30B for testing) , so I cannot provide any feedback if you recommend me any settings for now