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Ina Fried Mar 29
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Update lets you change iPhone battery settings—but you probably shouldn't

Apple's new battery settings
The new battery settings in iOS 11.3. Photo: Apple

Apple is out with an update to iOS that lets users see the health of their phone's battery and turn off a controversial feature that slows the iPhone's performance on devices with older batteries.

The bottom line: Just because you can doesn't mean you should. Apple only slows performance on devices where the battery can't perform at full throttle without risking crashing the phone.