[EVO 4G Q&A, Help & Troubleshooting] n3x1s:
Turning off 'always on data' may not be the best option. You most likely have an app that is trying to access the data network. A properly behaving app would give up after a few tries or inform the user that a data network isnt present. A badly behaving app may just continue to use full CPU time until it gets what it wants. Thereby draining your battery at a rapid rate.

My suggestion would be to do a factory reset. Then set the following settings:

1: Factory Reset, check for system updates. Make sure your are running the latest OTA udpate: 1.47.651.1 with the lastest Radio updates: Baseband Version-2.05.00.06.10. You can also try and update your PRL and PRI.

2: Enable "Always On Data" or "Background Data" (whatever its called) and turn ON 'Auto Sync'. Turn OFF "News Sync"

3: Enable "Always On Data while Roaming"

4: Turn OFF 4G

5: Turn OFF WiFi

6: Turn ON GPS

7: Turn OFF Bluetooth

8: Turn OFF Airplane mode

9: Turn ON Mobile Data

10: If you have a google account, set it up with default settings.

11: Do NOT setup any other email accounts yet. You can do this after testing battery usage with a semi-stock phone.

12: Do NOT setup Facebook

13: Do NOT setup Flickr

14: Do NOT setup Twitter

15: Do NOT run Google Talk (If you do, remember to disable "Auto Login". Google Talk will run down the battery very fast when it has a data connection, even faster when it doesnt have a data connection.)

16: Do NOT run any LIVE wallpapers

17: Manually turn off your screen when you are done using it. Or set the screen timeout to a lower value.

18: DO NOT RUN A TASK MANAGER. Android OS doesnt need one. If you start an app and the system needs more memory, it will TAKE IT! Most likely from apps that have been sitting 'idle' for the longest amount of time. If you would like to see what apps are loaded into memory, try the "Android System Information" app in the Market. It will show you whats loaded and whats actually running. It also has an application manager so you can uninstall stuff.

As far as your apps go, I cant really help you there. Start with a semi-stock phone like outlined above. Get a baseline of battery usage. Add a few apps and watch how the system responds. I RARELY add multiple new apps to my EVO. If its a new app, I add only that new app and watch to see if it affects my phone in a negative way.

You dont strike me as the type of person willing to do any modding of your EVO, which is fine. Alot of people get Android phones with no intention of rooting or playing. I will not go into the unlimited possibilities you would gain by rooting your phone. You are correct: You should get a fully functioning phone out-of-the-box. My EVO was. Now its just many times better with root and a custom ROM/kernel.

Now let the flaming begin: Feel free to stop reading here!

I've tried to help. If you dont feel like these steps are necessary and dont care to follow them or at least attempt to find the root cause of your problem, by all means get a f'n iPhone and get the hell off of MY network. Go be part of the AT&T network over saturation problems. But be warned - THESE SAME PROBLEMS OCCUR WITH THE iPHONE!! I cant tell you how many times the 'sheeple' at work come to me asking why their iPhones batteries are draining so quick lately. These are the same people that cant even setup their email or a WiFi connection on their iPhone. They download every f'n fart app and 'hand warmer' app and 'lighter' app from the App Store and piss and moan when they drain their battery. Rogue app problems occur even with the precious iPhone and under the watchful eyes of the App Store Nazis.