Hi there, I have a problem with my iPhone 5, iOS 8.4, old about year and half. Since the beginning I have my bluetooth, location services, auto-brightness etc. turned off, I close no longer using apps and all the stuff like that and the battery was just fine. Suddenly two days ago battery started draining very quickly, even when not using the phone at all. I tried to restore network services, didn't helped at all. For about a month I use my phone even less then before, just a few calls and playing a little bit of music and than this happened, I didn't install any new apps and kept settings the same. Yesterday I let the phone die and charged it completely, unplugged from charger, had 100%, went to sleep and woke up to 81%, usually I have 98% at least. Could someone help me?