I don't know if this has been posted in here yet (I am hoping to read through this whole thread this weekend), but I contacted HTC about the battery life along with a few other questions. They sent me a list of battery saving tips. Here it is:
1. Lower screen brightness
From the Home screen, press Menu and tap Settings Tap Display Tap Screen Brightness
2. Turn off Wi-Fi, GPS, and Bluetooth when you don't need them
From the Home screen, press Menu and tap Settings, and Wireless & Networks
3. Disable Wi-Fi and 4G network notifications
Press Menu and tap Settings, and then tap Wireless & Networks
4. Disable "always on" mobile data
This is one of the biggest battery savers. Home, Menu, Settings, Wireless & Networks, Mobile Network Settings, uncheck Always-on Mobile Data.
5. Turn off background data
From the Home screen, press Menu and tap Settings Tap Accounts & sync, and then uncheck the Background Data check box.
6. Lower the screen timeout interval
From the Home screen, press Menu and tap Settings Tap Display, and Screen Timeout
7. Manually turn off the screen when not in use
Since the screen timeout function ensures that the device's screen will turn off (unless you have it set to "never turn off"), it can be tempting to put the phone down when you're done using it and just let the screen turn off by itself.
8. Turn off auto-sync
From the Home screen, press Menu and tap Settings Tap Accounts & sync, and uncheck the Auto-Sync check box
9. Change auto-sync frequency (Weather, News, Stocks, Twitter, etc)
If you don't want to turn off auto-sync, you can adjust how frequently data is retrieved/updated. Home, Menu, Settings, Accounts & Sync, tap on the account you want to change, tap Account Settings, and then tap on Update Schedule to change the update frequency.
10. Disable wireless network location services when not needed
From the Home screen, press Menu and tap Settings, Location, and uncheck Location Services provided by your mobile network.
11. Turn off window animations
I know it's nice to look at and fun to show off, but eye candy uses extra power (albeit not very much). Home, Menu, Settings, Display, tap Animation, and choose no animations.
12. Don't use live wallpapers
Live wallpapers were one of the new features in Android 2.1, so it feels like a step backward not to use them. They don't hit the battery very hard when used, but they do make a small dent. So if you're trying to improve battery life, even if only incrementally, use a static wallpaper instead.
13. Use a dark wallpaper.
Some say that dark wallpapers are more energy efficient than light wallpapers. Others say it doesn't make any difference. Either way, there's no harm in using a dark wallpaper so you may as well do it.
14. Change Wi-Fi sleep policy
This may sound counter-intuitive, but leaving Wi-Fi on when the device isn't being used and the screen is off is actually better than letting it sleep.
15. Monitor your running services
Just because Android is supposed to an intelligent operating system that will manage your running apps for you doesn't mean it will always do things the way you want them to be done. Home, Menu, Settings, Applications, tap Running Services / Manage Applications to monitor what applications are running.
16. Choose your home screen widgets carefully
Widgets that need access to the internet to update information (e.g., Facebook, Twitter, Engadget, Slacker Radio, Weather, Stocks, News, Mail) can suck up a lot of juice if not managed well, so choose them carefully and set their sync/update frequencies to a reasonable interval.
17. Disable notification lights
This may not be practical if you're someone who really needs/wants to know when something happens on your phone when you're not looking, but for everyone else, feel free to turn off those notifications. Home, Menu, Settings, Display, Notification flash, and uncheck some or all of these options.
18. Turn off phone vibration
If the ringer is on, why do you need the phone to vibrate? Go to Home, Menu, Settings, Sound, and then uncheck Vibrate.
19. Turn off audible touch tones
From the Home screen, press Menu and then tap Settings Tap Sound, and uncheck Audible Selection
20. Turn off haptic feedback
Once you get the hang of typing on the device's on-screen keyboard, you can turn off the haptic feedback that was turned on by default. Home, Menu, Settings, Sound, uncheck Haptic Feedback.
1. Lower screen brightness
From the Home screen, press Menu and tap Settings Tap Display Tap Screen Brightness
2. Turn off Wi-Fi, GPS, and Bluetooth when you don't need them
From the Home screen, press Menu and tap Settings, and Wireless & Networks
3. Disable Wi-Fi and 4G network notifications
Press Menu and tap Settings, and then tap Wireless & Networks
4. Disable "always on" mobile data
This is one of the biggest battery savers. Home, Menu, Settings, Wireless & Networks, Mobile Network Settings, uncheck Always-on Mobile Data.
5. Turn off background data
From the Home screen, press Menu and tap Settings Tap Accounts & sync, and then uncheck the Background Data check box.
6. Lower the screen timeout interval
From the Home screen, press Menu and tap Settings Tap Display, and Screen Timeout
7. Manually turn off the screen when not in use
Since the screen timeout function ensures that the device's screen will turn off (unless you have it set to "never turn off"), it can be tempting to put the phone down when you're done using it and just let the screen turn off by itself.
8. Turn off auto-sync
From the Home screen, press Menu and tap Settings Tap Accounts & sync, and uncheck the Auto-Sync check box
9. Change auto-sync frequency (Weather, News, Stocks, Twitter, etc)
If you don't want to turn off auto-sync, you can adjust how frequently data is retrieved/updated. Home, Menu, Settings, Accounts & Sync, tap on the account you want to change, tap Account Settings, and then tap on Update Schedule to change the update frequency.
10. Disable wireless network location services when not needed
From the Home screen, press Menu and tap Settings, Location, and uncheck Location Services provided by your mobile network.
11. Turn off window animations
I know it's nice to look at and fun to show off, but eye candy uses extra power (albeit not very much). Home, Menu, Settings, Display, tap Animation, and choose no animations.
12. Don't use live wallpapers
Live wallpapers were one of the new features in Android 2.1, so it feels like a step backward not to use them. They don't hit the battery very hard when used, but they do make a small dent. So if you're trying to improve battery life, even if only incrementally, use a static wallpaper instead.
13. Use a dark wallpaper.
Some say that dark wallpapers are more energy efficient than light wallpapers. Others say it doesn't make any difference. Either way, there's no harm in using a dark wallpaper so you may as well do it.
14. Change Wi-Fi sleep policy
This may sound counter-intuitive, but leaving Wi-Fi on when the device isn't being used and the screen is off is actually better than letting it sleep.
15. Monitor your running services
Just because Android is supposed to an intelligent operating system that will manage your running apps for you doesn't mean it will always do things the way you want them to be done. Home, Menu, Settings, Applications, tap Running Services / Manage Applications to monitor what applications are running.
16. Choose your home screen widgets carefully
Widgets that need access to the internet to update information (e.g., Facebook, Twitter, Engadget, Slacker Radio, Weather, Stocks, News, Mail) can suck up a lot of juice if not managed well, so choose them carefully and set their sync/update frequencies to a reasonable interval.
17. Disable notification lights
This may not be practical if you're someone who really needs/wants to know when something happens on your phone when you're not looking, but for everyone else, feel free to turn off those notifications. Home, Menu, Settings, Display, Notification flash, and uncheck some or all of these options.
18. Turn off phone vibration
If the ringer is on, why do you need the phone to vibrate? Go to Home, Menu, Settings, Sound, and then uncheck Vibrate.
19. Turn off audible touch tones
From the Home screen, press Menu and then tap Settings Tap Sound, and uncheck Audible Selection
20. Turn off haptic feedback
Once you get the hang of typing on the device's on-screen keyboard, you can turn off the haptic feedback that was turned on by default. Home, Menu, Settings, Sound, uncheck Haptic Feedback.
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