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1. Use auto-brightness for the screen.
1.使用屏幕自动亮度调节
A smartphone’s screen consumes more energy than any other component, so the easiest way to cut down battery drain is to reduce your screen brightness. In an hourlong test, an iPhone 6s used 54 percent less battery power with the screen brightness at minimum as compared with maximum brightness. An Android test phone used 30 percent less.
智能手机的屏幕是所有元件里最耗电的，所以降低屏幕亮度是降低电池损耗的最简单的办法。在一个为时一小时的测试里，一台把屏幕调到最暗的iPhone 6S手机要比把亮度调到最亮的手机节省54%的电量。在安卓手机测试里，能节省30%电量。
But it’s tough to use a dim screen in bright environments, so most phones offer an auto-brightness mode that automatically adjusts the screen’s brightness based on ambient light. The Wirecutter found that enabling auto-brightness saved a good amount of battery life.
但是在明亮的环境下使用昏暗的屏幕是非常难受的，所以大多数手机都提供自动亮度调节模式，可以根据周围环境的亮度自动调节屏幕亮度。Wirecutter发现，开启自动亮度调节能够节省大量电量。
