automatically when you hit 20% remaining power: you'll see a warning flash up and the option to turn on Low Power Mode.
Do so and you will notice that the battery indicator turns orange rather than red (or the green it would be if you had plenty of power).
explains that when you close an app you take it out of RAM, this means that when you open it again the i Phone has to load it back into memory.
"All of that loading and unloading puts more stress on your device than just leaving it alone," he writes.
All of these exceptions, besides the latter, will put an icon next to your battery icon to alert you it is running in the background," he explains.Bear in mind, of course, that there might be something wrong with your i Phone's battery.Don't worry though, as in November 2016 Apple announced a free battery replacement programme for the i Phone 6s.Indeed, Apple itself - in the person of software chief Craig Federighi - has confirmed that closing apps doesn't do anything for battery life.Tim Cook was asked in an email, "Do you quit your multitasking apps frequently and is this necessary for battery life? " And Federighi stepped in to reply "I know you asked Tim, but I'll at least offer my input: No and No." Loveless adds that our fears that apps are draining battery life even when we aren't using them are unfounded, as they will only update in the background if they are set to in Background App Refresh.