Was browsing through the Health App section, interested in trying out a few apps (such as Human Activity) My only question is, what kind of affect will this have on battery life? Since these apps are designed to track every movement, activity, exercise while on your person, I'm concerned that this will KILL my battery. In fact, these apps say you must have App Background refresh turned on. I absolutely love my 6+ battery life, and would hate to kill it! Any insight will be appreciated.