Hair straighteners typically use heating elements to raise the temperature of the working surface, which accelerates changes in the structure of the hair's keratin molecules, resulting in new shapes. The heating element usually uses a positive temperature coefficient thermistor PTC (Positive Temperature Coefficient Resistor). PTC has unique electrothermal physical characteristics: when AC voltage is applied to the PTC element for heating, its resistivity is very low below the Curie temperature, and when the resistivity rises suddenly above the Curie temperature, the current drops to a stable value and automatically to control temperature and constant temperature function.

At the same time, there are a wide variety of hair straighteners on the market, most of them are large in size and need to be directly inserted into the preheating type, such as traveling, it is very inconvenient to carry, and can not guarantee that the socket can be used at any time, and small in size, preheating fast, portable and convenient to carry and use rechargeable portable hair straightener has brought a new breakthrough to the market.The latest portable hair straightener solutions use advanced technology, low standby power consumption, very high integration, greatly reducing the size of the product, making the hair straightener more compact and portable.