Warm Hand Treasures are not unfamiliar to everyone, and can be said to be a must-have tool for many female friends to avoid the cold in winter. However, there are many categories of Warm Hand Treasures, do you know? Do you know that there are certain precautions when using the hand warmer? Today, the author will briefly introduce it to everyone.

Hand warmers can be roughly divided into three types：

    One type is a hot water bag that generates heat by heating water, commonly known as a hot water bag. Unlike traditional hot water bags, electric hot water bags save the trouble of adding water. They only need to plug in the power and wait for a few minutes to generate heat. In fact, they boil the water inside, so the temperature is usually very high.

    One type is to generate heat through chemical reactions, and the hand warmers on the market are of this type. The heat generated by the contact of chemical substances inside is about 40 ℃.

    Another method is to use lithium battery function, with internal heating element generating heat, and charging and discharging through USB interface, similar to a warm hand mouse pad. Due to the charging and discharging function of lithium battery, it can generally be used as a mobile power bank. Compact in size, easy to carry around, with a temperature of up to 50 ℃.

Hand warmer
Precautions for use:
    1. After connecting the power, the indicator light will turn on, and the warming bag will start working. When the temperature reaches the set point, the light will turn off; Charging can also be done according to individual temperature needs;
    2. After charging, please disconnect the power supply. Do not connect the electric heating bag to the power cord for a long time, and unplug the power cord from the power outlet;
    3. Please wait by while charging to avoid accidents caused by prolonged charging time.

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