This has been discussed quite a bit by quite a few users on the Moto forum also. When KitKat 4.4.2 was first released for the Razr M I had 4 of them in my house (all 4 family members). Before KitKat I used to be able to go off the charger at 05:30 and use it all day and when I put it back on the charger around 10:00 PM, would still have 20-30% life...pretty awesome for a phone with a small battery. After KitKat, we all took a hit on battery life...my wife's phone was the worst. I could still go from 05:30 to around 12:00 Noon and need a quick charge to get through the afternoon & evening, with the same usage patterns. I unchecked the Backup All Settings to Google option, backed up all my personal files, pics, music, etc. and did a FDR. After the FDR and manually installing apps and settings the way I wanted them I was able to go from 05:30 to around 3:00 PM before needing a quick charge. And, the Android System / Android OS was much lower on the list of Battery Hogs. I noticed that Location services and location stuff was still using a lot of battery (all those new "gotta know your current location features"). So I manually turned Off all Location settings and that gained me another hour or two of battery life...if I needed GPS or Maps, I just turned Location settings back to On. So the FDR and turning Off all Location settings got me back to about 12 hours of normal use before needing a charge...not what it was on ICS, but at least I could get through a work day and get home before topping off for the evening.