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.



I did this the other day and thought I would check it again to be sure it was off and it was back on so you may want to check periodicaly...