Why does my mobile phone turn off soon when it's cold outside?

When a mobile phone encounters cold weather, it will be powered off quickly because of low temperature weather, and the capacity of the mobile phone battery will decay very quickly. Cold environment will make the electrolyte of mobile phone battery inactive. All the chemical reactions inside the battery slowed down, which eventually led to the phone being turned off.

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Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium ion batteries. Lithium-ion batteries contain no metallic lithium and can be charged. Lithium metal battery, the fifth generation product of rechargeable battery, was born in 1996. Its safety, specific capacity, self-discharge rate and cost performance are better than those of lithium-ion batteries.

When the battery is overcharged to a voltage higher than 4.2V, it will start to produce side effects. The greater the overcharge pressure, the higher the risk. When the battery cell voltage is higher than 4.2V, the number of lithium atoms left in the cathode material is less than half. At this time, the battery often collapses, resulting in a permanent decrease in battery capacity. ?

According to the different electrolyte materials used in lithium ion batteries, lithium ion batteries can be divided into liquid lithium ion batteries (LIB) and polymer lithium ion batteries (PLB).

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Baidu encyclopedia-Li-ion battery