Apple’s iOS chief Craig Federighi has dispelled the myth that force
closing your iPhone apps will help save your battery. The executive
confirmed that killing apps isn’t necessary for your battery and said
that he is not in the habit of closing his apps.
苹果iOS( Internet Operating
How to use Low Power Mode on the iPhone to save battery life？
Federighi, who oversees iOS and OS X, was responding to an email sent by
an Apple customer to CEO Tim Cook when he made the comments. In the
email, which was first published by 9to5Mac, the customer asked Cook,
"do you quit your iOS multitasking apps frequently and is this necessary
of battery life?"
Of course, it’s always a good idea to check your app settings every once
in awhile to make sure that the apps that are using your location
actually need it — as location services tend to use up the most battery.
Also, disabling background refresh on apps you don’t use very much is a
good idea. Some apps, like Facebook’s, may be worse offenders at sucking
your battery dry than others.