由于手機電池過熱和爆炸的報道，三星要更換數百萬臺Galaxy Note 7手機，我們不禁好奇：如果手機出現過熱、冒煙現象，甚至真的著火了，我們應該怎么做？

為了尋求答案，我們再次咨詢了電池專家：麻省理工學院材料化學專業John F. Elliott教授唐納德?R?薩德維(Donald R. Sadoway)博士。薩德維教授曾幫助我們解釋了電池爆炸背后的科學原理。

那么，薩德維教授對電池過熱的建議是什么呢？首先，如果手機正在充電，在確保安全的情況下，要立即拔掉電源。然后，你可以用滅火毯捂住手機。但他同時也指出，電池本身包含了著火燃燒所需的所有材料。也就是說，一旦電池過熱，與手機周圍的氧氣產生反應并燃燒，這個方法可能無法奏效。

“電池早期過熱是可以阻止的”，他表示。“但處于過熱晚期的電池就如同一輛失控的大貨車。”

這時，最好的辦法就是離開手機，并立即撥打911。如果你手機的是三星Galaxy Note 7，最好另換一款，以防萬一。據報道，即便是Note 7s，也存在電池問題，所以明智之舉還是選擇別的手機品牌吧。

作者：Alex Fitzpatrick

翻譯：劉進龍/汪皓

As Samsung works to replace millions of Galaxy Note 7 devices amid reports of overheating and exploding batteries, we were curious: What should you do if your smartphone starts to overheat, smoke, or, worse, actually catch fire?

So we reached out once again to battery expert Dr. Donald R. Sadoway, the John F. Elliott Professor of Materials Chemistry at the Massachusetts Institute of Technology, for an answer. Sadoway previously us helped explain the science behind exploding batteries.

His advice for overheating phones? First, if the device is plugged in, unplug it immediately, as long as it’s safe to do so. Second, you can try smothering the phone with a fire blanket. But as Dr. Sadoway pointed out, batteries already contain all the fuel they need to burn. That means smothering might not work like it would with a fire that’s fueled by the oxygen around it.

“Early stage overheating may be stopped,” he says. “But late stage is a runaway freight train.”

The best idea, then, may be getting away from the device and calling 911 immediately. If you already bought a Samsung Galaxy Note 7, it’s probably a good idea to swap it for another smartphone. (Even the replacement Note 7s are reportedly having battery problems, so it’s wise to pick a different model.)