Yes I turn it on after every recharge. It turns the battery indicator to yellow. On a serious note, it does double my battery life and I'm not the kind of pers

Yes I turn it on after every recharge. It turns the battery indicator to yellow. On a serious note, it does double my battery life and I'm not the kind of person to ever run bluetooth to start with. It just kills every app process background, turns off the non-sense, reduces consumption of the 4G / Wifi too I think. It gives me a smart phone I actually wanted in the first place. To me, this is the one reason to upgrade to iOS9 (also my ipad mini seems alive again after iOS8 ran it to the ground).