I have an iPhone 6 Plus. The thing is, when I just finish charging my iPhone, it will not lose any battery. For example if I charge the phone full before I go to bed, unplug it and leave it overnight, the next morning it will still be 100%. So that is around the 8 hours unplugged and the charge is still the same. But once I have used the phone it will lose around 5% during that same time overnight. For example the next night, the battery will be around 55% then when I wake up it will be around 50%. Why does this happen? I have app-refresh always off, location services only on when app is opened. All e-mails to manually check. Auto-brightness on. I always clear the apps when I'm not using them. I am jailbroken but no tweaks that would have a big effect on battery. Does anyone else's iPhone act like this. I just don't understand why it loses 5% overnight when it isn't 100%.