I did this trick and my battery life went from dieing in half a day, to lasting a day and a half. Go to settings Accounts & Sync And uncheck Backround data There are a couple annoying things about doing this but IMO its worth it. If you have widgets that auto update, you will have to manually do it. Also if you go into the Android Market you it will prompt you to enable the Backround Data again. You will either love this or hate this and not do it. But I thought I would share with all of you because you all have been helpful to me just reading!