Battery life is atrocious after ICS update. I use less than 2GB of data month, don't listen to music, and rarely stream video or check facebook during the day. After the ICS update, my battery was usually under 10% in less than 8 hours and sometimes within 4 hours.
I set up a Battery Extender rule that said whenever the screen was off and the unit was unplugged (not in dock or on a charger) it would turn off the data sync. The rule worked perfectly and my battery was typically at 50% after a days work and 10 hours off the charger. I did this for two weeks straight without a hitch.
Last week, I noticed my 4G icon was white. It stayed white and would not sync data. I cycled it into airplane mode and back, powered the phone off and on, pulled the battery, pulled the sim card, etc. Nothing I did would bring the data sync back. I finally deleted the Battery Extender rule in Smart Actions. It still didn't work. I force closed the program and VIOLA! My icon switched back to 4G blue and everything started syncing again.
I left it this way for a few days and the battery kept going dead too fast so I decided to try Smart Actions again. I set it up this morning. Two hours later I turned the phone on for a couple minutes and noticed the 4G icon was white and my phone was not updating email. I deleted the Smart Actions rule, force closed the program, and within 30 seconds my 4G icon was blue and the phone started sync'ing again.
Any thoughts on how to extend my battery life without this data sync problem?