Quitting iPhone apps does not save the battery
Apple executive busts one of the smartphone's biggest myths after being emailed by a customer
All it took was an email for one of the most popular methods of saving battery power on the iPhone to run out of juice.
Double tapping the home button on iOS devices to shut down multitasking apps running in the background does not save energy, the company's senior vice-president Craig Federighi said.
His comments came in an email exchange with an iPhone user in the US, who had written to Apple chief executive Tim Cook asking if the method was necessary for battery life and whether the company's bosses use it.
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"No and no," replied Federighi, before thanking the email-writer for being an Apple customer.
The emails were initially shared by the sender with 9 to 5 Mac, who point out that Apple executives respond personally to small questions and queries from customers every now and then, with equally "short and succinct" answers – such as an exchange Cook had with an Italian customer.
The website adds that the pointlessness of quitting apps might have been staring us in the face this whole time, too, as the laborious process of swiping every individual window to close it means it's "clearly not supposed to be a thing".
It adds: "On a technical level, most of the apps are either frozen in RAM or not running at all, the system just displays them as a history for consistency. This is why the battery life impact is negligible."
However, the method is valid on rival devices such as Nokia Lumia phones and Samsung phones have a Smart Manager app for handling numerous running programs, points out the BBC.
So what are the best ways to save precious iPhone battery power? According to The Guardian, the screen is the biggest drain so turning the brightness down will help. Push notifications and the aptly named "low power mode" are also good places to start.
The paper also recommends wearing a watch to avoid turning the display on and off to check the time, something you may do around 100 times a day, according to research.
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