At present, the quality of the products sold on the market is uneven, and it has not been widely promoted. Many manufacturers do not pay attention to the safety of the rechargeable hand warming products, and the technical threshold is low. We should pay attention to avoid possible injury incidents! < / P > < p > the structure of the charging hand warmer is similar to that of the mobile power supply, which is composed of a shell, an electronic circuit, a battery and a heating plate. Lithium ion batteries, which are commonly used in mobile power supply manufacturing, are also used as core energy supply components in such products. Compared with the thermal storage hand warmer, the portable rechargeable hand warmer does not have the risk characteristics of high temperature liquid splashing, but it may cause scald when used carelessly due to its long working time. < / P > < p > compared with the mobile power supply, although in order to be light and portable, the size of the charging hand warmer is usually smaller and the capacity is lower, but its internal heating plate will make the lithium-ion battery work in high temperature environment for a long time. In addition, the small internal space and a certain degree of insulation design, if there are defects in the product protection and control circuit design, the shell material that can not block the combustion source is used In case of temperature rise out of control or short-circuit overcharge and other abnormal conditions, it is likely to cause a fire. < / P > < p > ● check the trademarks and nameplates, and select the products marked with regular manufacturers and registered trademarks. Products without information shall not be purchased. Moreover, the identification of input and output ports of products shall be clear and accurate, the identification of rated input and output voltage and current value shall be complete, and the identification of rated capacity value shall be clear. < / P > < p > ● it should be noted that the battery capacity of the product is not equal to its effective output capacity, that is, we should not only look at the capacity information such as 10000mah which is separately marked on the conspicuous part of the product, but also check the rated capacity value in the specification parameters, which is the actual output capacity. < / P > < p > ● consumers should not blindly pursue low price and good-looking, but should measure their own demand, product brand, word-of-mouth and other information. In addition, they should remember to ask for invoices after purchasing goods to protect their legitimate rights and interests. < / P > < p > ● check the production date of the product and try to select the rechargeable hand warming products produced within one year. If the production date is too long, the capacity of the battery will decline, which will affect the use experience of the product. < / P > < p > ● try to avoid product falling during use. Once the temperature is obviously higher than the service temperature, stop using immediately and put it away from people. Huawei has finally made a choice! Xiaomi and ov have also followed up. Have you ever thought about today?