Since flashing to Eclipse 2.2 about a week ago i have not had any battery issues like i was on stock. I think i was 18 hours of use and still had 55%. granted, i turn off all syncs, my screen is the middle brightness, and since i have no 4g in my area i turned the setting to not look for it. I do run alot of N64oid with bluetooth and all that. But can still get 4 solid hours of playing on a full charge.