The major culprit of battery use back on Froyo and GB was the display. If I wasn't running the phone in an area that needed the brightness to be up for extended periods of time I saw little issue with battery drain. Now that I've switched to MIUI I notice that when the battery is almost dead Android System is always the number one process for battery use. With as much as it lists under its purview I cannot tell exactly what it is that is using up so much juice. Do all those processes such as FM Radio run anytime the phone is awake? I looked at the usage detail graph but I have no idea how to make sense out of the data there, looks like a defrag graph from my pc Anyway, any help would be greatly appreciated.