I've been trying all of the various tweaks posting in this forum and others to eek the most power I can from my Evo. Some work, some don't for long. Someone suggested that it's 3G eating all of the battery power when the Evo is idle. I used the toggle switch for mobile network and cut it off. I don't need my phone constantly online. Just having the ability is enough for me, it's like having a lighter in my pocket, vs. having a torch. I just want calls and the random SMS coming in. Since doing so my battery life is great. 7+ hours and having used less than 20%. Check the pic below: Only time will tell if this is the norm.