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So how do we use the power adapter reasonably? (1) Prevent the power adapter from being used in a humid environment and prevent water from entering. Even if you put the power adapter on a table or on the ground, be careful not to put wet objects such as drinking glasses around to avoid getting the adapter wet. (2) Avoid using the power adapter in a high temperature environment. In a high temperature environment, many people only pay attention to the heat dissipation of electronic equipment, and often ignore the heat dissipation of the power adapter. In fact, many power adapters generate as much heat as electronic devices such as laptops, phones, and tablets. When in use, the power adapter can be installed in a place that is not exposed to direct sunlight or in a well-ventilated place, and a fan can be used for auxiliary convection heat dissipation. At the same time, the adapter can be turned over, and a small object can be inserted between the adapter and the contact surface to increase the contact surface of the adapter with the surrounding air, enhance airflow, and dissipate heat faster. (3) Use the corresponding power adapter. If you need to replace the original power adapter, you must choose a product that matches the original model. If an adapter that does not meet the specifications and model is used, there may be no problems in a short time, but due to differences in manufacturing processes, long-term use may damage the electronic device or shorten its lifespan. Risk of short circuit and burnout. In general, the power adapter should be used in a heat-dissipating, ventilated, dry environment to prevent moisture and high temperature. Different brands and models of electronic equipment power adapters have different output interfaces, voltages, currents, etc., and cannot be mixed. If abnormal conditions such as high temperature or abnormal noise occur, stop using the adapter. When not in use, you must unplug the power plug or disconnect the power supply in time. In order to prevent damage to electronic products and personal safety of users caused by lightning strikes, try to avoid using the power adapter to charge during thunderstorms. Best regards, Mandy Huang

Nowadays, the power adapter has been integrated into our daily life and work. We use it everywhere. If we use it more, there will naturally be problems like this. Today, the editor will introduce the specific analysis and processing methods of the power adapter failure. As follows: Now computers generally use ATX power adapters. When the system fails, a comprehensive analysis should be carried out from the aspects of BIOS, the power adapter itself and the motherboard. According to the principle of "soft first and then hard" in computer maintenance, first check whether the BIOS settings are correct, and eliminate false faults caused by improper settings; the second step, check whether the ATX power supply is normal; the third step, check whether the motherboard power supply monitoring circuit normal. At the same time, when judging whether the power adapter is normal, you can remove the power supply and use a scrapped device (such as hard disk, etc.) as a false load to avoid no-load protection. Connect a 100-150Ω resistor between the PS-ON signal line (green) and the ground line to make the signal low. If the power supply can work, the fault is in the motherboard or BIOS settings, otherwise the fault is in the power supply itself. The power adapter plays the role of the source of power in the computer system. Whether it works normally or not is the key prerequisite for the normal operation of the entire computer system. However, in the routine maintenance process of the computer room, it is found that the power adapter, like other computer components, will also have various failures. Best regards, Mandy Huang.

Power adapters are very common in daily life, and of course there are some common problems, such as noise interference in the adapter. Shenzhen Waweis Technology Co., Ltd. is a professional power supply adapter manufacturer. Let's analyze the power supply for you. Why does the adapter have noise interference: 1. Suppress the EMI generated by the power supply itself; 2. Prevent external electromagnetic noise from interfering with the work of the load of the power supply; 3. Suppresses EMI generated by other equipment and propagated through the power supply. 4. Prevent external electromagnetic noise from interfering with the work of the control circuit of the power supply equipment itself; In addition to the drive circuit, the switching power supply also has a protection circuit, a program circuit, an input and output level detection circuit, etc., and the circuit is quite complex. These circuits are mainly composed of dedicated or general-purpose power supply integrated circuits. An effective way to prevent these circuits from malfunctioning due to external noise is to use noise filters. There are two types of propagating noise: common-mode noise and normal-mode noise. Common mode noise is the current flowing into the ground, and normal mode noise is the current flowing between the wires. When taking noise countermeasures, the common mode noise is mainly considered. However, in the low frequency range, a large proportion of noise is transmitted in the normal state. Therefore, an appropriate noise filter must be selected according to the noise components. Best Regards, Mandy Huang

1. Technology is advancing by leaps and bounds, people's living conditions are getting better and better, and everyone is basically a family. The progress of network technology facilitates us to search for information and materials, Taobao, watching news, etc., and has become indispensable for work, life, leisure, entertainment, etc. The main frequency of notebook computers is changing with each passing day, the LCD screen is getting bigger and bigger, and the power of the notebook power adapter is also increasing, reaching about 100W, which is almost a small desktop power supply! If you touch it with your hands, you might be surprised if you are timid, but you are just a hot potato! It won't catch fire or something? This is the worry of many people! 2. What should I do if the laptop power adapter overheats? It is normal if the heating temperature is constant. The notebook power adapter is actually equivalent to the power box of the desktop computer. The desktop computer has an electric fan, so it is not very hot, but the wind blown out after using it for a long time is still hot. The notebook is completely dissipated by the shell, so the heat is normal. And it will be hotter in summer, as long as the power supply can be normal, as long as the hand can touch it. It can also be placed on the radiator to assist heat dissipation. Today's laptops generally have overheating protection, and overheating will automatically power off protection. 3. Overheating protection circuit of power adapter The overheating protection types of the power adapter can be divided into the following categories: automatic reset type, manual reset type, non-renewable, non-resetable type and various other types that can provide equivalent thermal protection. 4. Five methods to solve the power adapter heating (1) Create a good heat dissipation environment, and place the power adapter in a location that is not exposed to sunlight and ventilated. Remember not to use it for too long at high temperatures. If you must use it for a long time, you must pay attention to heat dissipation. You can put the fan aside to assist heat dissipation. (2) In a high temperature environment, place the adapter on its side to reduce the contact with the ground area, so that the adapter can better dissipate heat and achieve the effect of heat dissipation. (3) A narrower plastic block or metal block can be placed between the adapter and the desktop, which can speed up the heat dissipation of the adapter. (4) The heat of the power adapter is generally caused by the combination of battery charging and computer consumption. We can set it in the notebooks with battery management software. Best regards, Mandy Huang

In fact, the sizzling sound in the power adapter is the sound of the inductance coil vibrating due to the action of the magnetic field when the alternating current passes through. The inductance coil is generally packaged with enamel, epoxy resin, heat shrink tape, etc. Generally, if the enameled wire is wound and packaged, It can be well sealed to isolate the sound generated by the vibration of the inductive coil. Power Adapter If the sound of the power adapter fluctuates when it is working, it may be that the upstream device of the inductor is short-circuited. In this case, danger may occur, such as a short circuit in a notebook and a spark at the plug. Of course, it is impossible. . First of all, under normal circumstances, when the notebook power adapter is powered on, it will make a faint sizzling sound, which is the sound of electric current. However, if the zigzagging sound is very loud, or it will be loud for a while and then small for a while, it is likely that there is a problem with the equipment. The manufacturer of the power adapter Shenzhen Huawei Electronics Technology Co., Ltd. has summarized two situations for you. 1. The power supply is unstable. The power adapter is actually a transformer. When converting the power supply, it will emit a sound with a fixed frequency. If the power supply is unstable, the sound from the inductance coil will be different. 2. The connection plug of the adapter is not tightly inserted, the connector is too loose, and the contact is poor, resulting in a large resistance, and the sizzling sound will also increase accordingly. 3. The inductor coil is generally packaged by varnish, epoxy resin, heat shrink tape, etc., which can protect the circuit and isolate the sound of the current. The sound of the electric current is naturally louder. Best regard, Mandy Huang

In the case of overload or short circuit of the power adapter, the temperature increase is a symbolic situation, and attention must be paid to avoid the appearance of a large number of problems. There are a large number of diodes and capacitors inside the adapter. If any of the small parts is short-circuited, the internal power loss will increase, and the heat will also increase. This abnormal working state often causes the product to heat up. If you are not careful, a fire can easily occur. When it is found that the power adapter has serious heat, it can basically be determined that a fault has occurred. If you continue to use it, it will greatly increase the safety hazard. Now, in order to save production costs, some manufacturers often use diodes inside the adapter that are relatively resistant, and the quality of the internal insulating tape will also be relatively poor, and the number of layers is relatively small, the internal temperature is high, and it is easy to deform. This eventually leads to a situation where the thick insulating layer on the outside of the adapter also deforms. Transformer windings can also experience skeleton melting due to increased temperature. As a consumer, when purchasing an adapter, you should carefully check its labeling. If you don`t understand much, you can learn it through the Internet. You must have a correct understanding of the workmanship, power, and voltage of the purchased product. Only the power adapter used with the equipment can meet the standard of use. Most consumers only know how to use adapters and electronic devices simply, but do not know much about their internal structure, so they need to pay more attention, and there are hidden dangers around them if they are not careful. As long as the power adapter is used as required, these problems will stay away from you, so there is no need to worry. The use of adapters should not be arbitrarily matched, and the original equipment should be used as much as possible. When replacement is required, the products should be equipped according to the rated power and rated voltage. Best regards, Mandy Huang

We know that some computer power adapters are not universal, but there are very few friends who know the reasons. Today, the power adapter manufacturer will tell you what the three reasons are. The main points are as follows: 1. The size of the output interface of the product is different: the interfaces of most laptop power adapter brands are different, which means that using other brands of power adapters cannot be plugged into your laptop for power supply. It is relatively safe to have different interfaces, because at least you will not plug in a power adapter that does not meet the current or voltage to supply power to the laptop, which will cause damage to the computer hardware; 2. Inconsistent voltage: The voltage of different brands of laptop chargers (power adapters) is inconsistent. Even if the power adapter interface is the same, you cannot use different brands of laptop power adapters for power supply; because the voltage and current are different, the battery life will be damaged. 3. Inconsistent current: Different brands of laptop chargers (power adapters) have different currents. For example, in general, Acer is 3.42A, Dell is 3.334A, Hp is 3.33A, Sony is 4.7A, etc. To sum up: In fact, the voltage and current of the same brand laptop power adapter are not the same. Therefore, even if the power adapter is used between laptops of the same brand, it is necessary to confirm the voltage and current specifications.

First briefly introduce the application scope of the power adapter Power adapter, whose English name is Power adapter, is a power supply conversion device for small portable electronic equipment and electronic appliances. It is generally composed of a casing, a power transformer and a rectifier circuit. According to the connection method, it can be divided into wall type and desktop type. It is widely used in telephones, game consoles, language repeaters, Walkmans, notebook computers, cellular phones and other equipment. According to the connection method: It can be divided into desktop type and wall type; According to the type of output current: It can be divided into AC output type and DC output type. Widely used in notebook computers, mobile phones, household IT equipment and others. How the power adapter works: In reality, most of the power adapters we come into contact with are switching power supplies. Switching power supply refers to a power supply that controls the time ratio of switching on and off to maintain a stable output voltage through modern electronic technology. The switching power supply of a power adapter is generally composed of a pulse width modulation (PWM) control IC and a MOSFET. Benefits: The conversion efficiency is high, the volume is small, and it can work in a wide voltage range. Disadvantages: It is more difficult to repair when a fault occurs, and it has a large interference to the power circuit. Power Troubleshooting: 1. Power line failure Line faults, including damage to the power cord, no power supply, poor contact port oxidation, etc. Focus on checking whether the input line and output line are powered on. If the line is faulty, it can be solved by replacing the power cord. 2. The fuse is normal, no output voltage The fuse is normal and no output voltage indicates that the switching power supply is not working or has entered a protection state. The first step is to check the value of the start-up voltage of the start-up pin of the power control chip. If there is no start-up voltage or the start-up voltage is too low, check whether the external components of the start-up pin and the start-up resistor are leaking. If the power control chip is normal, the fault can be quickly found through the above monitoring. If there is a start-up voltage, measure whether there is a jump between high and low levels at the output end of the control chip at the moment of booting. If there is no jump, it means that the control chip is damaged, the peripheral oscillation circuit components are damaged or the protection circuit is faulty. Chip, check peripheral components, check one by one; if it is jumping, in most cases, the switch tube is bad or damaged. 3. The fuse is burned out or blown up Mainly check the rectifier bridge, diodes, switch tubes and large filter capacitors on 300 volts. It may cause the fuse to burn and become black, or it may be caused by a problem with the anti-jamming circuit. It is especially worth noting that the fuse is burned due to the breakdown of the switch tube, which usually burns out the power control chip and the current detection resistor. The thermistor is also easy to burn out along with the fuse. [1] 4. The output voltage is too low The following are the main reasons for low output voltage: A. Switching power supply load short-circuit fault (especially DC/DC converter short circuit or poor performance, etc.), at this time, first disconnect all loads of the switching power supply circuit, and check whether the switching power supply circuit is faulty or the load circuit is faulty. If the load circuit is disconnected and the voltage output is normal, it means that the load is too heavy; or if it is still abnormal, the switching power supply circuit is faulty. B. The failure of the filter capacitor or rectifier diode at the output voltage end can be judged by the replacement method. C. The performance of the switch tube is degraded, which causes the switch tube to fail to conduct normally, which increases the internal resistance of the power supply and reduces the load capacity. D. The poor switching transformer will not only cause the output voltage to drop, but also cause insufficient excitation of the switch tube to damage the switch tube E. The 300V filter capacitor is bad, resulting in poor load capacity of the power supply, and the output voltage will drop as soon as the load is connected. 5. The output voltage is too high The high output voltage generally comes from the voltage-stabilizing sampling and voltage-stabilizing control circuits. In the closed control loop formed by the DC output, sampling resistor, error sampling amplifier such as TL431, optocoupler, power control chip and other circuits, any problems in any of these parts will cause the output voltage to rise. Best regard. Mandy Huang

Low-power mobile phone chargers can charge laptops that support the PD protocol. not recommend High-power PD laptop adapter, charging low-power mobile phones, this is no problem. Take a look at your power adapter, the supported input voltage and current, there are a variety of specifications that can be dynamically adjusted. The PD charger will automatically recognize the charging current of the mobile phone or computer, so as to automatically identify the appropriate voltage group for charging: Voltage: 20V, 15V, 9V, 5V Current: 3.25A, 3A Zda supports 65W (20V / 3.25A and 15V / 3A), and can also support 27W, 15W. The PD charger will automatically adjust the power range in the middle. 18W iPhone, 30W Android, mainstream models can all be charged, just use it with confidence. To put it simply, mobile phone charging and laptop charging involve three factors: charger interface, charger power, and charger protocol. Does the charger have enough charging power? The power of mobile phone chargers is generally around 40W. The possibility of charging the laptop is too small. The laptop charger power is above 45W, so it`s no problem to charge the phone. Are the charging ports the same, for example, they are all C port, and whether the C port of a laptop can be charged is also a problem. Although some laptops on the market now have a C port, they are pretty good-looking and can only transmit data and cannot be charged. If you want to charge each other, the premise is that the laptop C port can be charged, It does not support the fast charge protocol. Originally, the power adapter of the previous notebook computer only had one voltage and current output standard. As shown in the figure below, there is only one output standard 19.5V3.33A=64.935W, about 65W charging power, Of course, the power adapter itself has a certain power consumption, and the notebook computer itself will automatically adjust the charging input voltage and current, and will not charge according to this power. The current laptop charger has a variety of output specifications, such as the picture below, Z is 20V2.25A, 60W, and there are multiple charging specifications such as 15V3A, 9V2A, 5V2A, etc., so its adaptive charging range is wider. Charge laptops, mobile phones, and gaming devices less than 45W. Best Regards, Mandy Huang

Burn in refers to the use of high-temperature methods to impose environmental stress on products, while environmental stress screening (ESS: Environment Stress Screen) includes not only high-temperature stress, but also many other stresses, such as temperature cycling, random vibration, etc., as shown in the figure Show. Therefore, aging is a kind of environmental stress screening. But now many companies have expanded the meaning of the word "aging". Aging is equivalent to environmental stress screening. Environmental stress screening is commonly referred to as aging. We will continue to use the word "aging". Why must electronic products undergo a 100% burn-in test before they leave the factory; Because in the processing of electronic products, due to complex processing and extensive use of components and materials, various defects will be introduced (even if the product is well designed). Whether it is a processing defect or a component defect, it can be divided into obvious defects and latent defects. Obvious defects refer to those defects that cause the product to fail to work normally, such as short circuits/open circuits. Potential defects cause the product to be temporarily usable, but the defects will be quickly exposed during use, and the product will not work properly, such as insufficient solder. Although the product can be used, slight vibration may cause the solder joint to open. Obvious defects can be inspected by conventional inspection methods (ie ICT: In-Circuit Test, In-Circuit Test, which is to check the manufacturing defects and components by testing the electrical properties and electrical connections of online components (components on the board) A bad standard test method. It mainly checks the on-line individual components and the open and short-circuit conditions of each circuit network. It has the characteristics of simple operation, fast and rapid, accurate fault location, FT, etc.) to find out. Latent defects cannot be found by conventional inspection methods, but are eliminated by aging methods. If the aging method is not effective, the potential defects that have not been eliminated will eventually show up in the form of early failure (or failure) during the operation of the product, which will lead to an increase in the rate of product repair and an increase in maintenance costs. Electronic products are fully aging tested before they leave the factory, which greatly reduces the defect rate of products. In fact, the purpose of aging has a more important purpose (same as testing): continuous improvement of product processing technology through aging, continuous improvement of component quality, and improvement until aging is unnecessary. The circuit board must be tested after aging. If a component is found to be frequently damaged during the test, it means that the device has potential defects and the supplier needs to improve its quality.

GaN fast charging and PD fast charging are different concepts! GaN →Gallium Nitride is a third-generation new semiconductor material, which has the characteristics of large forbidden band width, high thermal conductivity, high temperature resistance, radiation resistance, acid and alkali resistance, high strength and high hardness. It was widely used in new energy vehicles, Rail transit, smart grid, semiconductor lighting, and new generation mobile communications are known as the third generation of semiconductor materials. As the cost of technological breakthroughs is controlled, gallium nitride is currently widely used in consumer electronics and other fields, and chargers are one of them. Simply put, GaN has a wider band gap. The wide band gap also means that GaN can withstand higher voltages than silicon and has better conductivity. In the same volume, GaN technology is used for charging. The output efficiency of the charger is higher than that of ordinary chargers. For example, a charging head made of gallium nitride material can achieve more output power when it is about the same size as an Apple 5W charger. From the above we know that gallium nitride is a kind of material, it has nothing to do with the agreement, the current industry development fast charging trend is PD chargers, so most of them will be applied to PD chargers. Using gallium nitride MOS tube chargers, the switching frequency can be increased, and the product volume can be reduced by 30~60% (single-port output) and weight by 20~40% compared with traditional silicon MOS tube chargers. In addition to fast charging heads, where else is GaN used? There are three more important directions: ➦The field of optoelectronics: like common LED, lidar and VCSEL sensors; ➦Power field: common power devices such as fast charging heads and inverters; ➦RF field: 5G base stations, radars, low-orbit satellites, etc. Are GaN chargers more expensive than other ordinary chargers? Compared with ordinary chargers, the R&D/manufacturing cost of GaN chargers is much higher, and the price will naturally be higher than that of ordinary chargers. For example, single-port GaN chargers and multi-port GaN chargers also have different prices due to different costs. What is PD fast charge? The PD protocol is a safe charging standard formulated by the International USB-IF Organization Association. As a member of this association, Apple's original PD charger also follows this standard. Apple has supported PD fast since the iPhone 8 series models released in 2017. iPhone8-iPhone11 series models support PD18W fast charging, and use with PD18W and above charger + USB-C to Lightning Apple fast charging data cable to achieve fast charging effect, and can charge up to 50% in 30 minutes; iPhone12 series models support PD20W fast charging, and use it with PD20W and above charger + USB-C to Lightning Apple fast charging data cable to achieve fast charging effect, and it can charge up to 60% in 30 minutes. Of course, the devices that use the PD fast charge protocol are not only Apple's iPhone, iPad Pro, MacBook, Samsung's Galaxy S20 series, etc., but also Huawei, Honor, Contact and other brand laptops. At present, the common mobile phone fast charging agreements on the market are as follows Such as QC2.0/3.0/4.0, SCP, AFC, PD, Dash Charge, VOOC flash charging, dual-engine flash charging, etc. Anyway! When buying a charger for a mobile phone/tablet/laptop, just check in according to the fast charging protocol and power supported by the device! Anyway, the condition of fast charging = device + charger + data line all support the same fast charging protocol and power. Note: The power of the charger is backward compatible. For example, using PD30W/45W/65W can charge iPhone12 that only supports PD20W, because the charger will intelligently identify the current drop required by the device, so you don`t need to worry about it~

Gallium nitride is an inorganic substance with the chemical formula GaN, a compound of nitrogen and gallium, and a direct bandgap semiconductor. The structure of this compound is similar to wurtzite with high hardness. Gallium nitride has a wide energy gap of 3.4 electron volts, which can be used in high-power, high-speed optoelectronic components. Traditional charging heads use semiconductor brick technology. The charging heads designed with this technology are relatively large and generate a relatively large amount of heat. Gallium oxide is a third-generation semiconductor black technology material that is widely used in the aerospace and military fields. The characteristics of high discharge rate and high reliability, used to design and manufacture charging heads, will achieve higher reliability under the condition of reducing heat generation and reducing volume. My MacBook Pro.EOS R6.EOS RP.iPhone 11 Pro MaxDJPocket2.Huawei Mate 40 Prc and many other devices can be recharged with gallium oxide super power. Greatly simplifies the carrying of charging equipment when going out

1. The difference between the charging power of the power supply 2. The difference between power supply equipment and application equipment 3. The difference between the USB interface 4. The communication identification channel of fast charging is different One: The difference between USB interface First of all, QC3.0/QC2.0 protocol can be our common Android Micro-B interface, USB type A interface, or USB type C interface. PD fast charge is a charging protocol belonging to the USB TYPE C interface and can only be used for the USB type C interface. Two: The communication recognition channel of fast charging is inconsistent PD fast charge is not recognized by D+, D- communication protocol. Note: PD fast charge is not recognized by D+, D- communication protocol. PD fast charging is identified by communication via CC pin. QC3.0/QC2.0 is synchronous D+, D- to identify the communication protocol. Micro-B This is also to distinguish between the two fast charging. In the USB type C interface, we know that there are also D+ and D- pins. Yes, yes, USB type C can be used for both PD fast charging and QC fast charging. The product. Micro-B and USB TYPE A can only do QC3.0/QC2.0 protocol. Three: The difference between the charging power of the power supply QC3.0/QC2.0 fast charge is the earliest high-voltage fast charge protocol, the charging power is generally the highest at 18W PD fast charge is currently the most complete fast charge protocol, the maximum supported power can reach 100W, the current common power is 18W, 30W, 45W, 60/65W, etc. Four: the difference between power supply equipment and application equipment QC3.0/QC2.0 application equipment such as: mobile phones, power banks, and other lithium battery charging equipment with a USB port with a power of about 18W PD fast charging has DFP (power supply mode), DRP (power supply/device bidirectional mode), and has the unity of USB interface functions, high power and other characteristics The scope of application equipment is very large, and there is a lot of room for phenomena. In fact, the difference between PD fast charge and QC3.0 fast charge is really very big, such as: test tools, test methods, no-load performance. . . And so on are all different. For those who are new to contact, these 4 points must be understood. Best regards, Mandy Huang.

1. Can adapters with the same voltage and different current be used on the same laptop? When the notebook is running at a high load, the incoming current is correspondingly larger, and when the notebook is lightly loaded or in standby, the current is smaller. The power supply with large nominal current has enough current margin. Some people use 45W It is no problem to use the power supply instead of 60W. The reason is that there is some margin in the design of the adapter, and the load power is less than the power of the power supply. Therefore, this kind of representative is feasible in general use. If you connect a lot of high power consumption Equipment, then it is more dangerous, so do not use a small current adapter instead of a large current adapter. 2. Is it normal for sparks to appear on the power adapter plug? If you connect the adapter to the laptop first and then connect the adapter, it is normal to cause sparks during contact at this time. You can avoid it by following the steps below: (1) Turn off the switch of the power socket first. (2) Connect the notebook power adapter to the power socket, and then turn on the socket switch. (3) Connect the DC plug end of the power adapter to the notebook. 3. Is the temperature of the laptop adapter normal? Normally, all laptop chargers, including mobile phone chargers, will emit warmth, because part of the electrical energy is converted into heat and the power supply will heat up. If it becomes hot, it is a low-quality charger. Best regards, Mandy Huang.

Apple officially released iOS 14.3 and iPadOS 14.3, and made many updates. In addition to being compatible with AirPods Max headsets, the biggest highlight should be the introduction of the new image format ProRAW. However, the eighth and ninth items in the updated list may be ignored by everyone, and did not attract many people`s attention. They are fixing the "device may not be able to charge wirelessly" and the MagSafe dual charger may not be the maximum power for the iPhone. Wireless charging problem. I thought it was a good thing, but after updating 14.3, a large number of third-party magnetic wireless chargers failed. However, not all of this update has been blocked. It is said that some magnetic chargers can still be used. As for whether it will continue to be blocked, it is unknown. According to the person in charge of the industry, most of the third-party magnetic chargers that failed this time were only cracked in the first half of the animation, and the subsequent interaction process was not completely cracked, and the cracking was only optimized for the iOS version at the time. As a result, after the update of 14.3, the battery does not charge after the pop-up window. There are even some wireless chargers that have a greater risk of damage due to long-term high-frequency operation. But having said that, it is Apple`s old way to block third-party accessories through updates, and accessories such as data cables also have this problem. In short, just adapt. Best regards, Mandy Huang

On-board chargers refer to conventional on-board chargers powered by car batteries (12V for cars, 24V for trucks), which are widely used in the field of lithium battery charging for various portable and handheld devices. Such as: mobile phones, PDAs, GPS, etc.; car chargers must not only consider the actual needs of lithium battery charging (constant voltage CV, constant current CC, overvoltage protection OVP), but also take into account the harsh environment of the car battery (transient peak voltage, System switching noise interference, EMI, etc.); therefore, the power management IC selected for the car charger solution must also meet: high-voltage, high-efficiency, high-reliability, low-frequency (conducive to EMI design) switching power supply chips. Characteristic Versatility, portability, fashion, safety With the development of the automobile industry, car chargers are widely used, showing the characteristics of versatility, portability, and fashion. Versatility: This car charger is equipped with four AC adapters for American, British, Austrian and European standards; it combines car charger, direct charging and USB charging into one to meet charging under different conditions; dual USB The output interface can charge multiple electronic products. And this product is also the world's first charger to charge iPad. It takes about 4 hours to charge the iPad. You can take the iPad for a drive. Portability: Portability is a major trend in the development of today's electronic products. The unique folding car charger design is adopted to reduce the product volume to 6.9×5.6×3.1cm, which is extremely convenient to carry. Fashion: For the high-end consumer group of car owners, the fashion of car chargers is also valued by manufacturers. Generally use ABS material and piano paint process, which is not only fashionable and exquisite, but also feels very good. Safety: The product has passed CCC, UL, FCC, CE and other international safety performance tests, and is guaranteed by insurance companies, which strongly guarantees the safety of use performance and consumer rights. Application The car charger is an accessory to facilitate car owners to charge digital products anytime and anywhere with the car charging source. Some high-end car chargers generally include 2 USB ports, which can charge two digital products at the same time. Such products generally have overload protection, short-circuit protection, high-voltage input protection, high-temperature protection, and four-fold safety protection functions to ensure safe use. The car charger can be used in the car, but also can be used for home use, realizing the three-in-one multi-function use of car charger, direct charging and USB charging. The car charger is an accessory for charging digital products anytime and anywhere with the convenience of the car power supply, saving you the cost of the battery. Such products generally have overload protection, short-circuit protection, high-voltage input protection, high-temperature protection, and four-fold safety protection function to ensure that you can use it safely. Features 1. The computer automatically protects the chip, which can be used with confidence no matter where it is, providing good protection for your device when charging. 2. Car charger plug structure, built-in fuse, over-voltage current is too large, the fuse will automatically blow to protect the safety of the machine. 3. The car charger also has a USB interface, which supports various USB interface power output. 4. IPhone/ipad can be charged through the power output interface. Precautions The car charger uses the car cigarette lighter as a power socket to directly charge the mobile phone. Since the voltage provided by the car is low, only an overload protection circuit is required inside the car charger. The front end of the car charger socket is designed with a fuse. When the current exceeds the range of the overload protection circuit, the fuse will be blown immediately to protect it. Note: You can only charge when the car engine is started! Regarding the car charger, there are the following precautions: 1. Do not use the car charger in a humid environment 2. Do not store the car charger in a humid environment 3. The suitable temperature for use is 0-45℃ 4. Keep away from children 5. Avoid lightning strikes 6. Pull out the plug in time after charging Therefore, out of safety considerations, we must buy regular brands and purchase genuine, inferior products that are prone to safety hazards. Car chargers are also divided into two types: direct charging and dock charging. You can choose to buy a cradle charger, that is, remove the battery and charge it to avoid the phenomenon that the mobile phone is burned due to the instability of the vehicle power supply and the sudden high peak voltage output. If you want to burn it, you will also burn the battery to reduce loss. There are various car chargers available on the market. If you choose to shop online, you must go to a regular website to buy. Best regards, Mandy Huang

1. Put the mobile phone with wireless charging function on the wireless charging board and place it in a good position so that it can be charged. Note that some wireless charging panels support different mobile phone models. You should choose the wireless charging panel according to your mobile phone model. 2. It does not currently support long-distance charging. This technology may be achieved in the future. What is wireless charging technology? According to a report in the United States, a research institution has developed a wireless charger that can be used for long-distance. This charger includes A transmitter with a plug, an electronic receiver, as long as the power supply within a certain range can be transmitted to the terminal equipment equipped with the receiver. 3. The wireless charger uses radio waves to transmit. Radio waves are not only an electromagnetic wave, they can also transmit energy and penetrate the air, thus making wireless power transmission possible. Extended information: A wireless charger refers to a charger that does not use the traditional charging power cord to connect to the terminal device that needs to be charged. It uses the latest wireless charging technology. By using the alternating magnetic field generated between the coils to transmit electrical energy, the inductive coupling technology will Become a bridge connecting charging base stations and equipment. Wireless charging technology obtained 20 patents in 2007. A variety of devices can use one charging base station. Wired charging of mobile phones, MP3 players, power tools and other power adapters will no longer exist. Best regards, Mandy Huang.

The Company Introduction: Shenzhen Waweis Technology Co., Ltd. is an emerging enterprise specializing in the development, production and sales of various power supplies and accessories. The main products are power adapters, switching power supplies, waterproof power supplies, constant current power supplies, lithium battery chargers, And other products. The factory is located in Henggang Street, Longgang District, Shenzhen, with a plant area of about 5,800 square meters. The company has R&D, production, quality, warehouse, business, and financial departments with more than 120 employees and complete production management. The system is recognized by the industry with integrity, strength and product quality. The company has a wide range of LED lamps, battery car chargers, led displays, power communications, monitoring equipment, industrial automation and other industries. "Respect for partners, carry forward the spirit of teamwork, be brave to innovate and develop, and be people-oriented" is the business philosophy of all employees, following in the footsteps of customers, continuously carrying out product innovation and service improvement. Develop together! The Company Culture: Core values: team innovation, integrity, dedication and efficiency. Our aim: to engage in the research, development, manufacturing, distribution services and power management of power equipment, and promote the development of world science and technology. Mission: a high-tech enterprise with excellent corporate culture based on quality, advancement by technology, and strong sustainable development capabilities. Best regards Mandy Huang

Nowadays, more and more places begin to use sterilization lamp, but many people don't know how it works. Basically be the lamp that passes special character to be able to emit a strong ULTRAVIOLET ray when bright, below such circumstance, how can just assure the action of ultraviolet ray sterilization lamp? This is very key, if you can grasp the knowledge of this aspect, then it can play a more powerful effect. The first, want to avoid surface layer to have the appearance of dirt or dirt as far as possible when installing ultraviolet disinfection lamp tube, this is very important. Because the dirty things of surface layer and dust cover may cause ultraviolet ray to have no way to illuminate come out, or it is to weaken to a certain extent, therefore must use industrial alcohol to carry on cleaning, and it is to do regularly to clean, can have the effect of ultraviolet ray tube irradiation and the extension of service life. Second, in peacetime to pay more attention to the maintenance of ultraviolet sterilization lamp, prevent the quartz part can be irradiated out of the effect, sufficient to ensure that there is no effect in the process of using the phenomenon. When you need to know whether there is a long-term use of ultraviolet sterilization lamp sterilization effect can go to buy can detect ultraviolet radiation intensity of some instruments, such as: ultraviolet radiation meter or ultraviolet intensity indicator card! Shenzhen Waweis Technology Co., Ltd. is a high-tech enterprise engaged in r&d, production and sales of uvc lamp. Main:UVC Sterilizer Lamp.Disinfection Uv Lamp.Uv Sterilizer Box.Uv Light.Uv Germicidal Lamp.Non Ozone Uvc Disinfection Lamp.Uv Sterilizer Bag and other products professional production and processing. The products have passed CE, FCC, ROHS,EPA and other certifications. The products produced by the company have perfect protection function, stable performance, safe and reliable. With professional r & d, production and sales experience, the company has accumulated strong technical advantages and rich market resources in the field of UVC Lamp. The company is now able to provide a full range of Disinfection Uv Lamp to meet your need. Best regards, Una Yang

Notes on switching power supply 1. Matters needing attention when selecting switching power supply 1) Select the appropriate input voltage specification. 2) Choose the right power. In order to increase the life of the power supply, 30% more rated output power can be selected. 3) Consider load characteristics. If the load is a motor, bulb or capacitive load, when the current is large at the moment of starting up, appropriate power supply should be selected to avoid overload. If the load is the motor, consider the voltage reversal during shutdown. 4) In addition, it is also necessary to consider the working environment temperature of the power supply and whether there are additional auxiliary heat dissipation equipment, and the power supply needs to be de rated when the ambient temperature is too high. The derating curve of ring temperature to output power. 5) Select various functions according to the application requirements: Protection function: over voltage protection (OVP), over temperature protection (OTP), over load protection (OLP), etc. Application functions: signal function (normal power supply, power failure), remote control function, telemetry function, parallel connection function, etc. Special functions: PFC, UPS 6) Select the required safety regulations and EMC certification. 2. Precautions for using switching power supply 1) Before using the power supply, determine whether the input and output voltage specifications are consistent with the nominal value of the power supply; 2) Before power on, check whether the input and output leads are connected correctly to avoid damaging the user's equipment; 3) Check whether the installation is firm, whether the mounting screws are in contact with the power board devices, and measure the insulation resistance between the shell and the input and output to avoid electric shock; 4) In order to ensure the safety of use and reduce interference, please ensure that the grounding end is reliably grounded; 5) The multi output power supply is generally divided into main output and auxiliary output. The main output characteristics are better than the auxiliary output. In general, the main output with large output current is the main output. In order to ensure the output load adjustment rate and output dynamic index, it is generally required that each channel should carry at least 10% load. If the auxiliary road does not use the main road, the main road must be added with appropriate false load; 6) Please note: frequent switching of power supply will affect its life; 7) The working environment and load level will also affect its life. Best regards, Shirley Liang