I use wanam mod and turned off the full battery notification. I checked my time on the battery charge and it never resets itself at all, after like three charges i was at 1day and 22 hrs, this is with all three charges going to 100% before i unplugged it again. I checked this morning and it didn't reset again. It still says 12hrs on this charge and the phones only been unplugged like 5 hrs, so this brings me to a question..........
Does that notification trigger the reseting of the time on the battery stats? That's the only thing I can figure that's doing it.