Portable charging hand warmer, also known as USB charging hand warmer, has not yet formed a unified name in the market. This is a new type of electronic product that is powered by batteries and has sustainable external heat transfer. The heating temperature ranges from 45 ℃ to 65 ℃, and the continuous heating time is generally more than 4 hours. Due to its portability, it is highly favored by consumers.
At present, the quality of hand warmers sold in the market varies greatly, and they have not received significant promotion. Many manufacturing enterprises have not paid attention to the safety of charging hand warmers, and the technical threshold is low. Therefore, it is important to avoid possible injury incidents!
The charging hand warmer is structurally similar to a portable power bank, consisting of a casing, electronic circuit, battery, and heating element. Lithium ion batteries (also known as "lithium-ion batteries") commonly used in the manufacturing of mobile power banks are also used as core power supply components in such products.
Typical composition structure of a charging hand warmer
Compared with thermal storage hand warmers, although portable charging hand warmers do not have dangerous characteristics such as high-temperature liquid splashing, they may still cause burns when used improperly due to their longer working time.
Compared with mobile power banks, although charging hand warmers are usually smaller in size and lower in capacity for the sake of portability, their internal heating plates can cause lithium-ion batteries to work in high-temperature environments for a long time. In addition, the small internal space and a certain degree of insulation design make it possible for fires to occur in the event of abnormal situations such as uncontrolled heating or short circuit overcharging if there are defects in the product's protection and control circuit design, and if the shell material cannot block the combustion source is used.
So when choosing such products, don't just focus on the low price and cute appearance, whether they can be used safely is the top priority.
Small purchasing suggestions:
1. Check if the product's user manual, certificate of conformity, warranty card, and accessories are complete.
2. Check the trademark and nameplate, select products with legitimate manufacturers and registered trademarks, and do not purchase products without information. The identification of the product's input and output ports (charge and discharge interfaces) should be clear and accurate, the rated input and output voltage and current values should be fully identified, and the rated capacity value should be clearly identified.
3. It should be noted that the battery capacity of a product does not equal its effective output capacity. Therefore, one should not only look at the capacity information such as 10000mAh that is prominently marked on the product, but also check the rated capacity value in the specification parameters, which is the actual output capacity.
4. Consumers should not blindly pursue low prices and good looks when making purchases, but should weigh their own needs and product brand, reputation and other information. In addition, they should remember to ask for invoices after purchasing goods to protect their legitimate rights and interests.
5. Check the production date of the product and try to choose a charging hand warmer product produced within one year. If the production date is too long, the battery capacity will be reduced, which will affect the user experience of the product.
6. During use, try to avoid causing the product to fall. If the temperature is significantly higher than the operating temperature (45 ℃~65 ℃), stop using it immediately and place it in an open space away from people.
Post time: Sep-27-2024