i am using custom karam profile without any further modding. my normal use is 30 mins call in a day, texting throughout (say 100 or 200 per day), 1 hour of angry birds rio, 1 and a half hour of wifi usage plus internet radio, music player for 1 hour and my availability is on for like 2, 3 hours a day on my phone, msn facebook and skype chat. and i got a lot of widgets on my home screen. this gives me a good 34 to 36 hours of battery life after the patch and the custom karam profile