They expected the flight to last five hours, but soon lost contact with it, fearing that the low temperatures had frozen the phone's battery.

他们预期此次飞行能长达5个小时，但很快就与装置失去了联系，并担心低温会冻结手机的电池。

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Read about some of these efforts here: " Texas Pioneers Energy Storage in Giant Battery" and " Frozen Fish Help Reel in Germany's Wind Power"

“德州巨大电池能力存储先锋”和“冷冻鱼帮助德国风力发电”

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It also tells you if you actually have a frozen battery (yes, really) before you really kill it by trying to start.

BBC: Your tips for coping in a colder UK climate

The trio discovered that quickly connecting and disconnecting the battery of a frozen phone forced the handset into a vulnerable mode.

BBC: Frozen Android phones give up data secrets