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As mobile phone users, all we want is enough battery life to last the day. 作为一个手机使用者，我们想要的仅仅是够用一天的电量。 Frustratingly, the older the device, the less power it seems to have. 但令人沮丧的是，设备越老，它的电量似乎就越小。 In fact, the amount of battery life our mobiles have on any given day depends on two key factors: how we use them on that particular day, and how we used them in the past. 事实上，你的移动设备的总电量取决于两个关键因素：你当天是怎么用它的，以及你以前是怎么用它的。 | 
