I have the Sedio 1750 mah battery and am still having bad battery life, so I did some investigating. Here's what I've done: entered the "testing mode" menu by tapping phone and entering *#*#4636#*#* "Battery history" -> "Other usage" (in the top box), "Since last unplugged" (lower box) I have "Running" at 42%. When I tap it I have time spent without sleeping at 6hr 21min. I then changed the top box from "Other usage" to "Partial wake usage" and saw the Android System has a blue line about 1/3 of the way across. I tried to use my phone as little as possible today. The phone has been unplugged for about 15 hours and maybe used for one hour, I have 15% battery left. I have 3 email accounts - two gmail and one exchange all using push. I don't think I have anything update more frequently than every 3 hours. Can someone who has good battery life follow the steps above and post what they have for "Running" and the "partial wake usage" of the android system? I would really help me to know if these numbers are average, high, or low. I tried to post a lot info. If you need more, let me know! Thanks!