No. Improper use of the rechargeable mini fan or poor quality batteries or charging cables may cause a circuit failure, even causing an explosion.
The reasons for the explosion are:
1. The battery itself. Due to internal battery defects, the battery itself explodes without being charged or discharged.
2. The battery core is overcharged for a long time. Lithium batteries can discharge instantly and generate a large amount of current under special conditions or environments such as temperature, humidity and poor contact, causing spontaneous combustion or explosion.
3. Short circuit. It's less likely. Additionally, consumers placing their cell phones near high temperature or flammable objects can also cause explosions.
In 2001, the General Administratione of Quality Supervision, Inspection and Quarantine issued the “Mandatory Regulations on Product Certification Management”. Mandatory product certification in China, called CCC certification or 3C certification, has been included in the “Product”. Mandatory Product Certification Catalog "Products include household appliances, automobiles, safety glass, wires and cables, toys and other products.
However, the reporter learned that USB devices are currently not listed in the “Product Catalog for Mandatory Product Certification” and there are no clear industry standards and specifications, so the quality cannot be guaranteed
On August 7, 2018, Huangshan Online reported that the hot weather in recent days has caused heat waves to many local citizens.hey on their computer. Small fans that can be used on the USB interface are becoming popular. However, the reporter learned during the visit that this type of fan does not fall within the scope of 3C certification and may also damage the computer during the charging process.
The USB fan mainly relies on a micro motor. The computer's USB interface can supply 500 to 1000 mA of current to keep the motor running. Computer damage is mainly caused by the fact that the voltage and current values of the USB interface are not constant and tend to fluctuate depending on the use of the computer. Once the power current becomes unstable, it will cause power failure and damage. the computer. " Xu Jian, who deals with the maintenance of electrical appliances all year round, said.
Master Xu told reporters that small appliancesUSBs have been used frequently over the past couple of years. In addition to fans in summer, there are also hand warmers and hand-heating mouse pads in winter. Wait, you can charge it directly with the data cable. But when charging with a computer, it is a trivial matter if the USB device is damaged. the entire motherboard of the computer will have to be disassembled and repaired, which will cost a lot of money.
"If you use a computer to charge USB devices, you should unplug it in time after charging is completed. If you are away from the computer for a long time, it is also best to unplug the data cable. "Master Xu reminds citizens that when purchasing USB devices, try to purchase products with the manufacturer's logo or ask the merchant to issue a receipt and strictly follow the instructions.
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The pXinhuanet-USB small fans become popular and beware of becoming “computer killers”