So, I've now had my Evo since launch and I have read forum post after forum post about various magic solutions to battery life. And I have experimented with them endlessly. So far, I've been able to extend the life of my battery to nearly 40 hours (wifi mostly running), or 20 hours (3g mostly running). I will post screenshots to prove it (I just unplugged), but first, I would like to see if anyone would be able to volunteer to try this out for themselves on their stock EVOs. (I'm running rooted, custom rom with some other stuff, so I want to see if these results will work on stock) First caveat: I'm rooted (Toast method) and running a custom ROM (RvU 1.3.2). This lowers the CPU overall and has a number of battery tweaks built in. Second caveat: I ran the Bugless Bloat Apps Removal Tool V0.3. This removes all the extra nonsense that Sprint and HTC have installed that keeps starting up in the background on its own. With that said, I wanted to find out if the following configuration choices will help anyone who is running stock Evo's. ---------------- I'll start with some real-world, tried and true tested ways to make sure you're not using what you don't need when you don't need to use it. These aren't Battery Voodoo steps, these are just things you can do to improve your battery performance. The Voodoo will be later. These steps are for 3g, folks. 4g sucks battery life, so that's that. Keep 4g off unless you're plugged in or craving rapid battery discharge. 1. Update your radio! -> Menu > Settings > System Updates > Update PRL 2. Turn off Always-on Mobile Data! -> Menu > Settings > Mobile networks > Uncheck "Enable always-on mobile data" 3. Disable Google Talk on start! (It's enabled and always on by default) -> Start up the Talk application. Then, Menu > More > Settings > uncheck "Automatically sign in" 4. Turn off Live Wallpaper. -> Menu > Wallpaper > Choose anything but "Live wallpapers" 5. Put the "Power Control" widget on your home screen and USE IT. Make a habit of it. -> Cut screen brightness to HALF. In total darkness, cut it completely. -> When you're done with GPS, turn it off. -> When you're done with bluetooth, turn it off. -> If you're near a wireless network and don't need 3G, TURN WIFI ON (wifi connected to a network uses less battery than 3g) -> Keep Auto-sync (refresh) off. Only use the Auto-sync refresh data option when you really, really, really want to A. waste battery life, or B. you are plugged in. These steps should give you a noticeable improvement in the life of your battery. Guaranteed! But, the improvement will be based on how well you managed Step 5 and how often you use your phone. It is subjective, because you're a unique and wonderful person who has free will. Now for some Voodoo! ----------- THE DR. EVO BATTERY VOODOO I'm going to start with the things that made my battery life last noticeably longer. Do all of the steps above, then do these. If you don't do the steps above, these won't matter one lick. And even if you do the steps above, these might not work for you because it is, after all, voodoo. Overclock Widget! 1. Install Unrevoked. -> A. Navigate to Menu > Settings > Applications > checkmark "Unknown Sources" -> B. Browse to this website: unrevoked. Install Unrevoked. 2. Go to the Market and install OverclockWidget 3. Add the widget to your home screen. -> Click the "+" > Widget > OverclockWidget 4. Run the Overclock Widget 5. Click "Allow" when the Unrevoked Superuser Request pops up. 6. Ignore the first Overclock! screen. It's not important. Neither is the number that displays on your widget icon. It never will be. 7. Click Advanced Settings -> A. Leave everything under "Screen On Freq Setting" as it is. -> B. Checkmark "Differ Freq Screen Off" -> C. Set BOTH the Min and the Max for "Screen Off Freq Setting" to "Clock:245000" -> D. Set the Update Interval under Advanced to 60 -> E. Checkmark "Use your frequencies" -> F. Checkmark "Auto start on boot" -> G. CLICK SAVE -> H. Power off your phone. Then power it back on. Now this next one seems to have been the biggest help to me. I have tried running this without Overclock and saw poor results. I have also tried running Overclock without this and saw poor results. The two need to be used together. Sweet Dreams! 1. Go to the Market and install "Sweet Dreams" 2. Run it. 3. Click "Settings" On the General tab: -> Change Ring Mode to "No action" -> Turn "Disable Wifi" On -> Turn "Disable Bluetooth" On -> Turn "Disable Data 3g/EDGE/GPRS" On -> Turn "Screen turns off" On --- -> Set Sleep Time to 00:00 -> Set Wake Up Time to 00:01 -> Checkmark every day of the week --- -> Set "Checking interval" to 15 -> Turn "Show Notifications" Off -> Turn "Display introduction" Off --- On the Location tab -> Turn "Activate filter" Off --- On the Motion tab -> Turn "Activate filter" On -> Set "Sensitivity" to Medium -> Set "Wake Up Once" Off --- On the Sound tab -> Turn "Activate filter" Off --- -> Click Back on your phone and then click the "Enable" button. (***If you power off your phone and power it back on, you need to do this last step again. There is no Auto Start ----That's it!---- If any of you try this voodoo, please let me know your results. Start at a 100% charge. You should see that 1st percentage point take quite a while to drop down.. and a much slower discharge rate overall. Good luck!