外媒：智能手机屏幕调暗真能省电吗？_时事

外媒：智能手机屏幕调暗真能省电吗？

Smartphone battery down to 10 percent? Time to turn down the brightness on the screen, right? It's a classic strategy to squeeze more juice from the battery. And it works. But that trick might be less effective than you think.

智能手机才10%的电量了?该把屏幕调暗了，对吧?这是争取更多电量典型的方法，而且切实可行。但那招没你想象得那样有效。

Because it turns out nearly half the battery drain on a phone happens when the screen's not even on. So says a study presented at a meeting of the Association for Computing Machinery.

因为事实上将近一半情况是屏幕暗着，但电池依然消耗着。美国计算机协会一次会议上发布的研究如是说。

Researchers eavesdropped on the activity of more than 1,500 Android phones—specifically, the Samsung Galaxy S3 and S4. They used an app they developed called eStar Energy Saver. The app logs the energy drain of the phone's apps and activities as they happen.

研究人员用他们研发的eStar能源节约助手监听了超过1500部安卓手机的活动——具体说来是三星Galaxy S3和S4。这个应用记录手机电池消耗情况及耗电时相应手机应用的状态。

They found that some 45 percent of the battery drain happened while the screen was off. A lot of that energy suck was apps updating in the background—downloading headlines and weather, while you're not actively using them.