I'm still getting drain and have also tried disabling iCloud, a couple of nights ago I turned off location services and it only dropped bout 1%, but i use apps that need permission to use so can't leave location services off, I've also noticed that if I'm in same room as WiFi router there is no drain but when i go to bedroom this is where the overnight drain happens even though I've still got full bars in my bedroom, could there be any interference with my phone and my computer by any chance, that's what I'm thinking now, maybe I'm mad lol!, it's just annoying the drain when the phone is fantastic on battery using it, or could it be the Intel chip? Any thoughts?