雙語揭秘智能手機屏幕調暗是否真的省電

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。
智能手機才10%的電量了？該把屏幕調暗了，對吧？這是爭取更多電量典型的方法，而且切實可行。但那招沒你想象得那樣有效。
　　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。
　　因為事實上將近一半情況是屏幕暗著，但電池依然消耗著。美國計算機協會一次會議上發布的研究如是說。
　　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。
　　研究人員用他們研發的eStar能源節約助手監聽了超過1500部安卓手機的活動——具體說來是三星Galaxy S3和S4。這個應用記錄手機電池消耗情況及耗電時相應手機應用的狀態。
　　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。
　　研究發現有大約45%的電池消耗情況發生在屏幕暗的時候。許多電量不足是因為應用在後台更新——比如下載標題、更新天氣，而事實上你根本沒一直開著這些應用。
And different versions of the same app require different energy supplies. For instance, some versions of the Facebook app were twice as energy thirsty as other versions. So app version choice could slow your battery drain。
　　此外，同一個應用的不同版本對電量的要求也不盡相同。舉例子說，有幾個版本的臉書用電量是其他版本的兩倍。所以說，選好版本也可以減緩電池消耗。
　　But one of the most hidden energy draws, zapping 12 percent of the battery, was just cellular paging: the pings from a cell tower every 1.28 seconds, that tell your phone if a call or message is on the way. Which is, ultimately, the price of being connected。
　　但最為隱蔽的電源消耗是蜂窩尋呼，可以用掉12%的電池，即手機信號塔每1.28秒就發一次的聲脈衝，提示你來電或者有簡訊。這歸根結底就是保持通信順暢的代價。

手機屏幕調暗並不能真正的省點，關掉後台的運行才真正的省點！

每次手機快沒電時都是把網給關了，耗電量立馬就見小了