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The author:(作者)delvpublished in(发表于) 2014/1/23 8:09:33 Lithium battery with fragile， frostbite of the Smartphone，
Fragile lithium-ion batteries, and frost-smartphones-Smartphone,-IT lithium batteries information Fragile lithium-ion batteries, and frost-Smartphone
Northern cold of December, I went to Tianjin, where a snow a few days ago remained entranced with the city. Although every time before going out I would guarantee that all electronic equipment body capacity of not less than 90%, but I'm frustrated to find that single-camera power-off speeds can be measured in minutes, is even worse, low temperature charging efficiency is extremely low. Found in almost all electronic devices before unsustainable, I once thought that a problem with lithium-ion batteries.
NYT Bits columnist Nick Bilton has similar experiences, he said that seen from experience, not only in the heat of a Smartphone automatically shut down due to overheating can also automatically turned off because of the cold. As soon as temperatures return to normal, phone will wake up with it. But he's puzzled--does this mean that smartphones will suffer damage in extreme temperatures? If so, whether such damage is temporary or permanent?
An interview with Nick Bilton has some in the industry. Writer and technology entrepreneur Seth Porges, through a series of related experimental observation of the popular mechanics concludes that Smartphone shut down prematurely due to low temperature, but when returned to normal, everything is normal.
In the interview, Porges said he and Environ laboratory of the extreme conditions on the phone test: Environ controls test the temperature drops, and monitor real-time changes in the Smartphone until the Smartphone screen turns black.
Porges said that experiment found that when the temperature drops below ten degrees below zero, some smart phones begin to darken the screen and quickly enters a low battery State, when the temperatures reach below zero, some devices automatically shut down, and continued to fall to lingxiasanshidu, almost all devices experience battery and screen problems, in an unusable state. And once when you enter lingxia40dao55du, all devices all give pause.
Professor of chemistry and electronic engineering, University of Waterloo Linda f. Nazar said that most of the Smartphone has not suffered permanent damage in the bitter cold, but some cheap lithium battery may be affected . Be safe, Nazar also recommends that people avoid using smartphones in cold conditions.
Smartphones currently using batteries are lithium batteries, lithium-ion batteries under low temperature condition easy precipitation decrease battery performance. And on the other hand, lithium-ion batteries are usually set low temperature protection, battery lithium metal deposition, chemical reactions and material no longer occur.
Apples website recommends that the iPhone uses the temperature should be between 32-95 degrees Fahrenheit. Apple said that low temperature not only reduced iPhone battery life, and may also affect the phone's ability to regulate temperature.
IT information related reading:
IPhone is not antifreeze: cold power
脆弱的锂电池，冻伤的智能手机 - 智能手机,锂电池 - IT资讯脆弱的锂电池，冻伤的智能手机
北方酷寒的十二月，我去了一趟天津，在此几日前的一次降雪依然素裹着这座城市。尽管每次出门前我都会保证全身所有电子设备电量不低于90%，但我沮丧地发现单发相机的掉电速度几乎能以分钟计算，更糟糕的是，低温中充电效率也极其低下。在发现几乎所有电子设备一样难以为继前，我一度以为锂电池出了问题。
纽约时报Bits专栏作者Nick Bilton拥有类似的体会，他说从经验上看，智能手机不仅仅会在酷暑下因过热而自动关闭，也会因酷寒而自动关闭。一旦气温恢复常态，手机便随之苏醒。但他疑惑的是——这是否意味着智能手机会在极端温度下受到损害？如果有，这种损害究竟是暂时的还是永久性的？
Nick Bilton为此采访了一些业内人士。撰稿人和科技企业家Seth Porges通过观察《大众机械》的一系列相关实验得出结论：智能手机的确会因为低温而过早关机，但当回到正常气温时一切正常。
在采访中，Porges讲到了他与Environ实验室的一项关于手机的极端条件测试：Environ会控制测试温度下降，并监测智能手机的实时变化，直到智能手机屏幕变黑。
Porges提到，实验发现，当气温降至零下十度，一些智能手机的屏幕开始变暗，并迅速进入低电量状态，当气温达到零下二十度时，一些设备自动关机，而继续降至零下三十度时，几乎所有的设备都出现电池和屏幕问题，处于不可用状态。而一旦进入到零下40到55度时，所有设备全部歇菜。
滑铁卢大学化学和电子工程教授Linda F. Nazar表示，绝大多数的智能手机都不会在严寒中遭受永久性损害，但一些廉价的锂电池则可能受到影响。安全起见，Nazar还建议人们极力避免在酷寒中使用智能手机的情况。
目前智能手机所采用的电池多为锂电池，在低温状况下一般锂电池很容易析出导致电池性能下降。而另一方面，锂电池通常设置了低温保护，电池中的金属锂会产生沉积现象，不再和物质发生化学反应。
苹果官网建议iPhone的使用温度应在华氏32到95度之间。苹果提到，低温不仅仅会缩短iPhone的续航能力，同时还可能影响手机调节温度的能力。
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《iPhone不抗冻：天冷耗电快》
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