If you need a USB C Hub with more than 4 Hub, or you usually need to connect the mobile hard disk with Hub, you must choose the product with the external power supply.

 As we all know, the maximum current values that USB2.0 and USB3.0 can transmit are 500mA and 900mA, while a mobile hard disk (HDD medium) requires 450mA to 800mA (depending on the different models) to stabilize the drive. In other words, to connect a mobile hard disk on USB2.0 Hub, moving the hard disk will be very reluctant; if the USB3.0 Hub connects the mobile power to the keyboard and mouse, the mobile hard disk is also faced with a hidden danger of insufficient power supply. The problem is that the unstable power supply of mobile hard disk can easily cause hardware failure, resulting in damage to hard disk and important internal data.

Therefore, as long as you feel the possibility of using USB Hub to connect the hard disk in the future, whether it is USB2.0/3.0 Hub, you should choose the type of external power supply to make up for the deficiency of the power supply of the USB interface itself. In fact, there are still a lot to be noted about the purchase of USB Hub.

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The utility of car jump starter and the key to the start of the car, many owners know, the key moment of the current, save the car in the hot water, the majority of the owners are a lot of praise, now the basic car owners will be prepared to travel. But there are many kinds of car jump starter, such as metal and ABS, which is good?

No matter what material, the power supply must meet the temperature resistant and flame retardant requirements, if the jump starter for car internal short circuit or failure, can be a good protection of the user.

It looks good on the surface of the metal case and is completely flame retardant. However, in the process of use, it is likely that the metal shell will be conductive, the power supply is short-circuited or burned, even the safety of the owner and the car insurance are threatened, so it is still a good choice.

The plastic housing is divided into the ordinary plastic shell and ABS engineering plastics. Ordinary plastic, when the car jump starter is short-circuited or the fault produces high temperature, it will be damaged or even melt directly, threatening the safety of the owner. In contrast, the ABS plastic shell has good insulation, high and low-temperature resistance, and has excellent impact resistance, and can be fully competent for the car jump starter. The use of the power supply.

With the increasingly fierce competition in the automobile products market, the quality of the car jump starter manufacturers has been paid more and more attention. The quality problem has become the real problem of the automobile supplies industry. Ensure the quality of the product. How can we ensure the quality of the jump starter for car? This is a problem that many entrepreneurs are exploring.

Let's take a look at these three points.

1. quality is tested

Almost all enterprises are gatekeepers of QC, so that one to one quality inspection can be carried out so that quality can be up to standard.

2. quality is produced

The general standard of the enterprise will strictly control the production, which cares about the survival of the enterprise, so in production, the management department do a good job of management system implementation, the production personnel must be based on service to produce a quality product for the customer.

The 3. quality is designed.

Quality depends on product design, which is mature, stable and convenient for production.

Then how can we ensure the quality of products?

The main thing is to see the following three points to know:

1, the first close to the product design, in addition to a mature and stable product, more convenient for production, testing and not easy to damage the target, if the design is not done well, it is out of control to produce product defects. Therefore, product design must be strictly controlled in the design of products.

2. After the first pass is designed, the next step is manufacturing and production. This is the second hurdle of product quality. In production, the workers must be strict. The so-called quality of the quality of the first class management, in the technical management department, the production personnel must be strictly implemented according to the requirements of the standardization of procedures, that is, the execution of the production. To produce good quality and quality products.

3, the third pass, the quality is tested out, in this test, it is undoubtedly the strict control of QC. In the quality management system, the QC personnel must test the products one to one to ensure that each product is qualified, such as the unconformity of the discovery, and the immediate improvement. So in the final analysis, all quality is guaranteed by management, design and production inspection process.

Finally, the individual thinks that the quality of all enterprises should be summed up in the same way, because the management method must be strengthened, strict and improved. The quality of the product can be realized.

In recent years, the market competition of car jump starter is very fierce. With the fierce competition, the quality problem of product has begun to be paid attention to by automotive supplies enterprises. "No good quality is not good tomorrow" is no longer a hole in the wall. It has become the real problem of the life and death of automobile industry. To ensure the quality of good products, you must understand the following points:

1, the quality is checked out, all enterprises are QC checks, to achieve one to one quality testing, so that the quality of the standard. 2, the quality is produced, the general standard enterprises will strictly control the production, which is related to the survival of the enterprise, so in production, the management department must do a good job in the management system, the production personnel must be based on service to produce a quality product for the customer. 3, the quality is designed, the quality depends on the product design is mature, stable and easy to produce, is the practice of excellent enterprises.

Then how can we ensure the quality of the jump starter for car? In the design of product design, the product design, in addition to facilitate the mature and stable product, more to facilitate production, testing and not easy to damage the target, if the design is not done well, it is equal to out of control, resulting in product defects, so the design of products in this respect must be strict. Lattice control product design. The second pass is the production and production of products, which is the second pass of product quality.

In production, the workers must be strict. The first class quality comes from the first-class management. In the technical management department, the production personnel must strictly follow the requirements of the standardization of the program, that is, the execution of the production, and make good quality products. On the third level, quality is checked out. In this test, QC is strictly controlled. In the quality management system, the QC personnel must test the products one to one to ensure that each product is qualified, such as the unconformity of the discovery, and the immediate improvement.

So in the final analysis, all quality is guaranteed by management, design and production inspection process. At last, aajia technology believes that the product quality of all enterprises is summed up in the management method, because only the management methods are strengthened, strict and improved, the quality of the products can be achieved.

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car jump starter is also known as a multi-functional car jump starter in the industry. Why is it called "multi-function"? Because it has the characteristics of the traditional car starting power, it is more compact and portable with the current mobile power supply through technical improvement. The new car jump starter integrates the advantages of the traditional car jump starter and the mobile power supply. It can not only start the car, but also charge the mobile phone, the tablet computer, the portable computer, and the car supplies. And the volume is almost the same as mobile phone power, so it is very convenient and practical. So what kind of battery should be used for such a multi-functional car jump starter?

With the continuous expansion of the car jump starter market, there are now many mobile power sources that are known to be able to launch automobiles. Some friends will doubt that the small mobile power output is not enough. How can we drive the car starter? In fact, the principle of starting a car with mobile power is slightly different from the traditional way of rescue.

The bypass is the battery of the rescued vehicle so it can not use positive and negative connections, otherwise, it will generate huge charging current and burn out the equipment. And the way to rescue the emergency power supply of multi-function cars is to use the car's battery as a huge capacitance. The car starts the power supply to charge the battery. After the load of the battery, it can produce the current needed to start at the moment of launching.

Equivalent to the power of a multi-functional car to start the power of the power of a long time of the power of the instant release of power, the power consumption is very small, a 10AH car jump starter, in theory, if the energy transferred to a 60A battery, the battery can be charged from 0 to 3% of the state of charge, and then the battery will have the opportunity to send. Move the car.

Therefore, the battery used in the multi-function car jump starter power bank should use a high output power lithium-ion battery. The car jump starter of Nevada function car is a built-in high-performance polymer lithium-ion battery, not ordinary lead-acid battery can be compared. The general lead-acid battery is large and heavy. It is not conducive to carrying and using and is not conducive to the application of life, and lithium polymer batteries have solved these problems well. And the use of high rate lithium ion battery function of the car jump starter service life is very long, the charging and discharging cycle can reach more than 500 times.