The battery life on my Aria has never been great but recently I've noticed it getting a lot worse. For instance, the last few days after a few text messages in the morning and then basically doing nothing with it all day the battery life is down to 20% by 4:00. According to the battery usage meter, 38% (the most usage) of the battery was used for "android system" followed by cell standby which I get. I also have a Captivate and the most I've ever seen for android system is 4%. What could be the reason for this usage by the android system?