Maybe it's a coincidence but I upgraded the wifey iphone to 8.0 and a few days later her battery drained like an Ebola infected man. I thought ok it's 8.0, so I upgraded to 8.0.2 and then 8.1 and still the same. I changed three different batteries and still the same. I tried turning off this and that and still no change. Finally I took the phone to the Apple store. They say a DFU restore won't help since I already restored from scratched and suggested turning off the motion home screen. (Really?!!!) Finally I said, F'it! The wife is pissed at me and nothing will get her iphone from draining in 4 - 5 hours to zero with nothing running. So I paid the $269 for a new iphone 5. Low and behold it came with 7.1.2. I will not upgrade to 8 ever! Now wifey is happy and I can get some peace of mind. Best $290 spent!!