Originally Posted by bobfig
what tweaks have you done?
Tweaks for Evo to improve battery life=
Turned off wifi hotspot except when I need it.
Turned 4g off unless downloading something or watching videos off internet. 3G is fast enough for regular use.
Set back light to manual about 70%.
Adjusted the update frequency of apps, some update every minute or so.
Disabled Google Talk, it is a big battery hog and I don't use it.
The Talk application tracks the presence of your Google Talk contacts in order to let you know who is available to instant message. Each presence change uses power, even if you do not have the Talk application open.
If you do not use Talk on your device or do not mind if it is only operating when you actually have the application open, then you can eliminate this extra battery consumption:
Press Menu then tap All apps > Talk > Menu > More > Settings
Uncheck the automatically sign in box.
Make sure you exit the application by going to Menu > More > and selecting Sign Out
In order to again receive Instant Messages through the Talk application, all you'll need to do is open the Talk application again and it will automatically sign you in.
Note: Make sure you always exit the application by selecting Sign Out to reduce battery consumption. Exiting the application by use of the back or home keys will not sign you out and battery life will not be improved.