1, hand warmer is an automatic heating health care product developed based on physical and chemical principles. This product is very popular because of its novel and unique advantages, such as automatic heating, fun, practicality and so on-hand warmer has many functions, such as automatic heating, physical therapy, health care and so on.
2, hand warmers, can be roughly divided into three types: one is to heat by heating water, which is what we commonly call a hot water bottle. Different from the traditional hot water bottle, the electric hot water bottle saves the trouble of adding water. Just plug in the power supply and wait 10 minutes to raise the temperature. In fact, the water inside is boiled, so the temperature is usually very high. One is to generate heat through chemical reaction, which is the type of hand warmers on the market. The temperature of heat generated by the contact of internal chemicals is about 40℃. The other is to use the function of lithium battery, the internal heating chip heats up, and the USB interface charges and discharges, similar to the mouse pad of hand warmer. Because of the function of lithium battery, it can also be used as a mobile power supply. Small size, easy to carry, the temperature can reach about 50℃.