We found that with iOS 8.2, application health, without asking anything, has started automatically collect our physical activity (steps, stairs). Never mind that before upgrading to have it removed if you put the new version of IOS on your iPhone will have been re-activated alone.
What does this mean ?, that the phone is transmitting note every move health information application, and, in short, sucking the battery of our device "without permission."
How do we go ?, deactivate adjustments-pivacidad-physical activity and sports deactivate the option to follow.
Once this is done you will notice greater autonomy on your iPhone, so simple and so effective. Unless we want to have that information ... that soon we will have a better way thanks to Apple Watch.