I have to disagree with this comment. Before I rooted and installed this Rom, I was getting an average of 18 hours battery life. I installed the Basic GB 2.3.3 Rom with EF02 and got about 26 hours. I installed this Rom and got about 24 hours for the first couple days. Then I went to do the Battery reset procedure and ended up wiping the wrong data. That prompted me to restore my backup and do the reset procedure again. After that I have currently 3d0h57m47s on battery and 39% battery left. I will take a picture of my battery life when I get closer to 15% which I estimate will be tomorrow morning when I wake up. I have not surfed the net, turned on wifi, turned on BT, accessed email, accessed the market place, or used the overclock on this since last restore. I have made phone calls, used sms, used the camera, and set my alarm clock the last three days. After this test is complete, I will test it out with Wifi enabled and that's it. No surfing the net or anything else. I want to see what exactly drains my battery the most. I think it might be Wifi searching for signal in my case so this will prove that true or not.