Citation: http://edition.cnn.com/2013/12/13/tech/mobile/cold-weather-phones/index.html?c=tech&page=1
Fahrenheit is not listed in the metric system. Both Celsius temperature and Fahrenheit temperature must be written on the article. I can't realize how hot the temperature is in Fahrenheit.
Though I was afraid that my smartphone on heated floor may malfunction, the article made me relieved.
