This may sound like a dumb question, and I apologize ahead of time if it is.... But what exactly is supposed to improve the battery life? Is it the ROM, the kernel being used, or do I have to get SetPcu in order to improve battery life? I've heard a lot of ROMS where people get over 24hrs on a single charge. I'm just wondering if its the ROM, kernel being used or their using setpcu, or is it all the above?