The reason why the charging cable hair is hot is because of the consumption caused by the need to transmit electricity.
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Charging is often the use of the charger to connect the charging line to charge the mobile phone, at this time the charger connection strip is 220 volts, he needs to convert the 220 volts voltage to 5 volts rechargeable voltage, because to improve the charging speed, while it is also accompanied by hot generation. At this time, the temperature of the charger is relatively high, so the charging cable should be connected with the charger, so it also brings hot while transmitting electricity.