It's hard for me to explain how much so because you don't know how I use my phone but let's just say by this time in the morning it's usually down anywhere from 96 - 94%! I know it's not gotten much usage yet, but like I said, it would have already dropped six or so percent by this time every morning. I'm stoked! I never turn wifi off (ever.) Screen stays at 60%. Bluetooth always off. Anyone else already experiencing a definite improvement?