A scientific explanation for why your phone dies when it’s cold outside


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iPhone 5 (Philip Brookes/ flickr)
Kasey Dresser | January 24, 2018

Your phone uses rechargeable batteries called lithium-ion batteries. When your phone is on, the electric current moves from the top-half of the battery, the anode, to the bottom, the cathode. When your battery is dead all of the ions are in the cathode and at full capacity, the ions are all embedded in the anode. Scientists believe that battery runs slower in the winter because the cold creates slow reactions. The ions are having trouble jumping back and forth from the cathode to the anode and the phone interprets the lack of discharge as the phone being dead. Therefore causing it to shutdown sooner.

 

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