The application field is enhanced and expanded with technology, and mobile power first appeared in 2001's ces exhibition, with the simple idea and cheap raw materials.

The main application of mini power bank is for emergency, for example, when we use the phone, and use a digital camera to take pictures, when playing PSP game in full swing, PDA is working and so on, all of a sudden power outage makes people feel sad, and the mobile power market arrive as a result of this need in time. With the growing number of portable electronic products, the mobile power has extended to digital products mobile power, from mobile phone charging power, and these products include: laptops, tablet PCs, digital cameras, camcorders, portable DVD, PDA, MP3/MP4, GPS, thermal equipment, healthcare equipment and so on.

In this period, mobile power technology has made progress, from the view of components, the first one is battery: from Single-core electromechanical to NiMH battery and then lithium battery, polymer battery, with a capacity 20000mAh, which is a large-capacity mobile power. Now we commonly use polymer lithium-ion battery, which is widely used in 5V devices.

From the point of view of function, the security and intelligence have obtained development. The current portable external battery charger  must have a popular demand: short circuit, overcharge, over discharge, constant current, constant voltage and other protective measures. Intelligent mobile power is the high-performance power management technology allows mobile power can be convenient parameter display and practical application. For example: smart battery indicator is supported by a power management system.

After the development of the mobile power energy supply technologies, it can also support the development of mobile Internet, and currently there are mainly thin-film battery technologies, piezoelectric materials technology, wireless charging technology in this area. The inherent logic wireless charging mobile power market growth is: no matter how excellent the performance is, it cannot be effectively applied when the phone, tablet PC or smart products cannot stay in power , without the power cable.

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Mobile power is a set of rechargeable batteries, boost, charge management in one of the portable devices. Chu dielectric generally use lithium batteries, lithium batteries because of relatively small size, large capacity, broad market liquidity, affordable, is widely used in digital products. Lithium voltage between 2.7-4.2V, the voltage drop along with a decline in consumption. The 2.7-4.2V voltage can not be directly charged to other digital products, digital products lithium because the voltage is 2.7-4.2V, the voltage potential between the same can not be charged.Therefore, the output power is outwardly mobile power boost system must be put voltage of 2.7-4.2V lithium boost to 5V, so you can charge it to other digital products, such as mobile phones, MP4, Tablet PC, PSP and so on.

Of course, the mobile power is not a one-off device, which can be reused hundreds of times. So when power mobile power after use, we must give mobile power charging. The principle is the same, and to charge the phone. Connected to a computer's USB port or 5V USB Power Charger for charging mobile power. Therefore, there must also be an internal mobile power charging management system. Rechargeable lithium battery management system according to the voltage automatically adjusts the charge current. Process are: pre-charge, constant voltage charging and floating charge and so on. 

The following describes the next component. 
Power Batteries: 
Commonly used polymer lithium battery, 18650 lithium battery, AAA NiMH batteries. 
Polymer battery: Standard voltage 3.7 V, the shape more customizable, has a large capacity, inexpensive, widely used, such as: mobile phone, MP4, portable speaker. 
18650 Lithium Battery: Standard voltage 3.7V, with small size, large capacity, standard voltage 3.7V, mainly used in notebook computers and other high-end products. 
AAA NiMH batteries: Standard voltage 1.2V. Capacity is relatively small.Should be widely, household appliances, and other players. 
Boost System: Boost mainstream technology basically uses DC to DC boost mode. Conversion efficiency of domestic technology generally low, generally in the 50-70%. 75-80% in Taiwan. The United States will be relatively higher. Also there is relief programs, the efficiency is relatively high, but the consistency of batteries with high requirements, so rarely used. 
Charge Management System: The domestic charge management system is relatively mature, intelligent IC monitors the entire charging process.Mainstream Management IC with PT4056, PX40, etc. Charge time 5000maH about 8 hours. Fast charging of the battery life has adverse effects.

With the 3G mobile Internet and intelligent terminal the growing popularity of, carry Pets mobile-type electronic products is also increasing and more, big-screen smart phones, tablet computers, notebook computers, etc., functions increasingly diversified, use is also more frequent. The use of mobile power also will be common, almost everyone a smart phone mobile power users. This is how large this market! However, due to market brand mix, product standards vary, even artificially high electricity and other inferior products which are mixed to become the industry's biggest worry. As a lithium-ion battery industry leading enterprises, Sony is quietly look into this mess but huge potential market, and plans to push forward with Panasonic lithium battery manufacturers mobile power standards promulgated.

Industry prospects but the brand mix

According to statistics, China has a digital product total over 1.3 billion units, individuals also have five kinds of digital products, consumers are more than 100 million! This is how great digital products market, also left how great mobile power market space! According to conservative data analysis, only 3% of the purchase in accordance with market demand, that the next year and more mobile power market capacity is about 24 million units, up to 50 billion yuan of sales and marketing capacity. So the respect of currently on the market in terms of mobile power the development prospects of optimistic about the. Data show that the, currently on the market registered Guo's mobile power brand over four hundred, involved in the production of the manufacturers more than 3000. While the mobile market is gradually increasing power of course, but due to low barriers to entry on the market quite a mixed bag of the brand, product quality, but off the ultimate victims are the consumers. Currently on the market, including mobile phone operators, a battery supplier, battery manufacturers and other manufacturers of mobile power brightest conservative estimate there are 34 one thousand. Accompanied by a huge amount of funds the influx of, mobile power products the quality of the worrying, "the industry lack of standards, fragmented nature of the market characteristics, coupled with quick success of the speculative behavior of, this industry already exists very optimistic the quality of the hidden dangers, the capacity virtual standard , jerry-building phenomena have occurred. "industry insiders analysis, said.

Leader needed to build standards abroad

It is understood that the current market dominated by mobile power capacity vacuity, safety, batteries overcharge and over discharge protection, the conversion rate of the batteries several major problems. Sony responsible for the mobile power of the market responsible person FUKAO Shinya expressed: "PC power supply has industry standards, the but the mobile power supply but it is blank, domestic and foreign Du has not yet to have a unified industry standards. Currently in the the domestic market on the, various manufacturers order to seize the customers, to attract eyeball, the capacity imaginary the subject of situation is very serious, a lot of Callout 5000mah's products, the actual capacity is only 3000mah, or even smaller. "

"In fact, the capacity is only on the test mobile power consumers of a mental eligibility criteria including power consumers do not see the security, if there is over-charge and over-discharge protection, power conversion rate problem is the consumer When using the mobile power problem can not be found. "Sony responsible person in charge of mobile power markets FUKAO Shinya said.

It is understood that manufacturers enter the mobile power market threshold is not high, that is, the batteries plus a circuit board. But the actual in the electric core on the but there is much fineness. For manufacturers, the if the electric core using's yes first-tier Dachang, then the price aspects of there would be no advantage. Therefore in the materials used aspects of, as long as is not too bad on the line. At present, some domestic manufacturers much the same way, pre-first with good material to attract consumers, and so enhance the brand image, and on capacity can be shrunk. For example, a 3000mah power, minus a 300-400mah, users simply do not see, a power to save a few batteries, shipped thousands of units a month, profits came out. In particular Some of cottage manufacturers, the choice of some of the unsolicited electric core, this kind jerry-building the practice of caused by the direct consequence of the is security Xing reduce the, for their own products as well as charging equipment and even users were personal safety Du caused by threat. In addition, the available in the market some mobile power supply order to reduce costs, the use of xubiao, electricity core's B product, C Commodities battery carry out assembled shift power supply, so that the capacity is very high, substantive conversion very poor.

With advances in technology, the smart phone features increasingly more months, power consumption is also growing, but mobile phone battery capacity is not much improved, in order to make the phone longer battery life, and some friends started to buy mobile power. 

Some users suspected mobile power capacity, will not explode, in fact, would not explode capacity size with no direct relationship only with the protection of a relationship is perfect, protecting thoughtful, large capacity and then nothing would happen, protection is not good, the capacity re-small battery will explode. In addition, the polymer lithium battery is placed in the fire burning just take gas only, not explode. 

Price is also the focus of attention, the same capacity mobile power, and some sell very expensive, some very cheap, mobile power capacity is only one of the parameters, the quality of batteries used, the internal circuit chips used are also very key. Use of international brands of batteries: If SONY, ATL, SANYO and other costs are much higher; Then there are the internal circuitry, mobile power consumption is limited, in charge of the high cost of land use becomes. Currently undoubtedly boost the most efficient way of synchronous rectifier, boost efficiency up to 97%, on average, 94%, non-synchronous rectification most efficient booster circuit is generally about 88%, the average is about 75%, the synchronous rectifier output The stability is relatively much higher, but the synchronous boost program costs than non-synchronous boost to a few times, so the market price is relatively high. In addition, the mobile power will also increase the brand value price gap. 
Some people worry that using a mobile phone charging power to charge the phone or bad, this generally will not, 5V for charging mobile phones and other digital devices designed for mobile power supply output voltages are within the standard range, design, material issues in the case without charge effect with the original charge, computer USB interface is the same, there is no charge a bad case of mobile phones. However, as the market moves on the poor power quality doped missing, the output voltage, the current instability, there will likely burn out the motherboard, so try to use the big brands conditional mobile power, and not just look at price. 

Buy mobile power when it is not the capacity the better? In fact, this depends on the individual's needs, to meet the needs in the case of relatively small capacity portable, after all, is not much of a breakthrough battery technology, to improve the capacity of the battery is only heap, so the volume will go up. 
There is also the capacity to use similar mobile power vary greatly in doubt, this general information may vacuity, some mobile power supply on the market only spent two do not know 18650 parallel to the nominal 24000maH, currently the highest capacity 18650 should be Panasonic and Samsung 2900maH 2900maH, even if the use of these two batteries, the capacity but also 5800maH. In addition to virtual standard capacity, there is a problem on the first one mentioned in the boost circuit efficiency. 

Select Move power, is the choice of lithium-ion batteries or lithium polymer batteries, polymer in this regard is of course good, but safe to mobile power battery protection is mainly to see whether the improvement, protection well, as safe. However, lithium polymer batteries do not explode, relative level of protection. 

Want to maximize the use of the hands of mobile power electricity to charge the phone 

First, choose a lower output voltage mobile power, many mobile phones (Nokia, except) Input voltage 4.5V-5.4V in the normal charge, why does the output voltage low energy efficiency: Mobile power supply output voltage - charge management circuit regulates voltage = phone battery voltage, we can see from the above, the lower the output voltage, the battery voltage is higher, the charge management circuit consumes less power, for example mobile power output 5.4V, the battery voltage is 3.8V, the charging current is 800ma , then the charge management circuit consumes electricity is: (5.4-3.8) × 0.8 = 1.28W, which is more than 1W of power wasted as heat, so the same efficiency in the same capacity mobile power, the output voltage can be lower mobile phone battery provides power to the more; Then try not to wait until the phone battery drained before charging. 

Secondly, try to use good quality cell phone batteries: Why do you say, because those who will have the battery internal resistance, good battery internal resistance is much smaller, the resistance is equivalent to a resistor string inside the phone, the charging time This greater the resistance, the more energy consumed, which electrical energy is transformed into heat. Charging the battery died when we touch the phone's back cover should be easy to understand.

Mobile power for mobile Internet development provides a strong support in this area are mainly thin-film battery technology, piezoelectric materials technology, wireless charging technology. 

In the mobile Internet era, the client's use of a very important part in its use of time, no matter how excellent performance, if the mobile phone, tablet PC or smart products in the absence of the rest of the power cable can not boot the case that they can not be effectively applied. 

The need to improve the battery life on a method, a way to reduce the energy usage of the same time, like iPad, save all you can save power consumption mode, save all you can save space, but for the rapid development of IT products indeed in terms of discomfort. Another method is to improve battery performance, the product can provide a more sustainable life, the development of mobile Internet mobile power needs support in this area are mainly thin-film battery technology, piezoelectric materials technology, wireless charging technology, the following for everyone to make a detailed introduction. 

Thin film batteries 

Solar energy is easily accessible to a source of energy. Application of solar energy in human history, it has sought to question. Monocrystalline silicon solar cells at this stage, although large-scale applications and industrial production dominates, but also exposed a number of shortcomings, which the main problem is the high cost. By both monocrystalline silicon solar cell material prices and the impact of the preparation process, to further significantly reduce the cost of silicon solar cells is very difficult. 

So have their substitutes thin film solar cells, including amorphous silicon thin film solar cells, copper indium selenide and cadmium telluride thin-film cells, polycrystalline silicon thin-film solar cells. Amorphous silicon thin film solar cells is the most important advantages of low cost and convenient preparation, due to its photoelectric conversion efficiency as a continuation of the attenuation of the illumination time, it is obvious instability. 

As for copper indium selenide and cadmium telluride thin-film silicon cell efficiency than amorphous silicon thin film batteries is high, lower costs than single crystal silicon cells, and ease of mass production, there is no sharp drop in the efficiency problem, seems to be an amorphous silicon thin film batteries species better alternatives. Polycrystalline silicon thin film is generated in the battery production process large contamination should not be ignored, the raw material selenium, indium, tellurium and metals are relatively rare, further reducing the cost of a smaller space. 

Polycrystalline silicon thin film batteries due to the amount of silicon used in less than silicon, and inefficient plummeted problem, and use may be prepared on cheap substrates, the cost is expected to be much lower than the monocrystalline silicon cells, laboratory efficiency reached 18%, far higher than the amorphous silicon thin film cell efficiency. Therefore, the polycrystalline silicon thin film battery is considered to be the most likely alternative to silicon cells and amorphous silicon thin film solar cell generation, has now become an international solar hot research field. 

Thin film solar cell production costs are lower, its market share continued to grow in recent years. Currently photoelectric conversion rate is the highest CIGS thin film solar cell, up to 20%, but with more than 30% of the theoretical value is still far away, the main problem is the material indium, gallium distribution and proportion of value is difficult to achieve the desired . 

Although thin-film battery technology are higher, but in the mobile Internet era, this is still an industry full of opportunities. In China, China's largest export amount up to modern home textile manufacturer, and now Vosges shares but has thin film solar module production, R & D and production of crystalline silicon solar cell module which two photovoltaic business. Allegedly, its wholly owned subsidiary Vosges Photovoltaic Technology Co., Ltd. is currently working with the German Bosch company to discuss the next step of cooperation, which includes the transfer of shares and other programs. Vosges PV manufacturing a copper indium selenide thin film solar module, is a second-generation photovoltaic technologies highest photoelectric conversion efficiency thin film solar cell, the absorption coefficient of visible light and the photoelectric conversion efficiency of all thin-film solar cell material relatively high. 

In the United States, the U.S. solar companies are also rich in Indiana building a large thin film solar module manufacturer, scale, or the nation's largest. 

Of solar energy applications, the efficiency and clean doubt, a thin film solar cells to achieve efficient use of mobile devices for expansion, will play a very significant role. 

Piezoelectric material 

Piezoelectric materials are subject to pressure when a voltage between the end faces of the crystal material. The piezoelectric effect of the principle that, if the pressure of the piezoelectric material, which will produce a potential difference, called positive piezoelectric effect; contrast voltage is applied, the resulting mechanical stress, is called the inverse piezoelectric effect. In recent decades the use of piezoelectric material and gradually expand the scope of, and now find that it is the most practical value of the new human energy. Using piezoelectric materials do wind turbines and wind turbine blades fans, new energy and air used in combination, did not affect the function of wind turbines and electric fans and efficiency, but also the implementation does not consume any extra energy to obtain a practical value of the power to the wind turbine to improve efficiency, so that fans can become a generator, make the air of new energy efficiency exponentially. 

Piezoelectric materials are currently the best new energy materials, the use of piezoelectric material with air new energy mix, this new energy structure of output energy to meet the energy needs of humanity, if this new structure to get full use of energy, will be able to further reduce greenhouse gas emissions and slow down global warming, speed, direction of development of the human environment towards benign. 

Wireless charging technology 

Wireless charging technology the most important is two things, one is the sender on the socket, the other is a receiver on electronic products, as long as a certain range, the power can be transmitted instantaneously to achieve effective. 

September 1, 2010, the world's first wireless charging technology to promote standardization organizations - Wireless Power Consortium announced in Beijing Qi wireless charging will be the first to introduce China to international standards. Ministry of Information Industry Communications Electromagnetic Compatibility Quality Supervision and Inspection Center also joined the organization. LG Electronics has launched its first wireless charger WCP-700. 

Wireless charging technology uses a unified industry standard for mobile phones, PMP/MP3, digital cameras, laptop computers and other products can use the new low-power, high-compliant same wireless charger. This charger is similar to a tray directly into the power supply, the league certified with "Qi" logo of corporate handsets of different brands can be completed directly on the above charge. For different electronic products, power interface can automatically correspond to needs charging, the transmitter and receiver chips will also start working automatically, when fully charged, the two sides will automatically shut down. It also automatically recognize the type of equipment and energy requirements for 'individual work', which is the smart. 

March 30, mobile platforms and semiconductors, enterprise ST-Ericsson has introduced a power management solutions, greatly reducing mobile devices with respect to the wall outlet charging time. This innovation is one of its PowerHUBTM product, the product can capture many sources of energy, not only is the user faster charging, but also can effectively reduce greenhouse gas emissions. 

Now, to consumer safety and convenience, wireless charging technology officer at close range wireless charging technology development, but also for remote charging begins further study. Once you have implemented this technology, not just low-power mobile devices, even household appliances, medical equipment, office equipment and so can achieve wireless charging, charging may be side by side without batteries, 

Epilogue 

With the accelerated pace of modern life, mobile device applications become increasingly widespread. Develop as many mobile power equipment providers must deal with one of the problems. Mobile power achieved effectively improve endurance who can market in this sunrise considerable increase profits. 

Meanwhile, the mobile power is a technology with people's lives, so that people can achieve anywhere achieve the same as at home in the office full use of electronic equipment to facilitate people's work entertainment.

Currently on the market from the point of view of mobile power, the capacity is divided into several levels, it is mainly divided into several categories, mobile power network problems received today, namely this, so make a separate length of the article to tell you about look, common mobile power capacity, as well as to solve customer problems, the maximum capacity of the mobile power is how much?

The first clip-type mobile power:
Clip-style mobile power, generally is mainly used in Apple phone, Samsung and some other fashionable and slim mobile phone, clip-style mobile power commonly used polymer batteries (the exact words, only polymer batteries before easy to manufacture), due to size constraints, the general capacity between 1500-3500, in particular the decision is based on how thick the clip, in general, clip-in will not be very thick, which would also violate slim phones vision, so when users purchase more than the capacity, if not very thick, it is basically vacuity.

The second class of common mobile power,
There are square, round, anyway, have a strange, is generally used 18650 and polymer batteries, common in the capacity of around 2200-12000, in fact, this type of mobile power is our most common, now largely 1A is to maintain the output. Small-capacity mobile power may still be used to 500mA output.

The third category is a special mobile power
That is friends mentioned this issue, taking into account some special occasions, so some mobile power doing great, greatly accelerates Lynx mall to see a 30000mAh mobile power, but the price is also very expensive, nearly more than 3000 blocks. Perhaps this is not the most expensive. These are generally applicable ALICE or special circumstances. Usually the user does not buy meaning, because the capacity and volume, weight is proportional to the average user moves back one so much power, it is really steal sheep. Very expensive thing.

Adapter with a cell phone or digital products do not match 

Encounter this problem when using a mobile phone or digital cable that comes with the product itself can link the mobile power to charge a cell phone or digital products. 

Adaptors quality problems 

If the replacement period of time can find manufacturers change adapter, can only buy one if it exceeds the same adapter, or using a mobile phone or digital product itself comes with data cable charging. 

Pair cable is broken 

If the replacement period of time can find manufacturers for double cable, if exceeded only buy a similar pair cable, or using a mobile phone or digital product itself comes with data cable charging. 

Mobile power can not be switched 

No electricity: 
If you have just received can not open the machine to open the machine, there may be no electricity, you just come up with double cable and mini-USB adapter on the computer to his first charge (charge 3-5 minutes on it), In the win can boot, boot continues charging. 

If you can not drive after the use of a direct charge on the adapter, if the charge does not go to show that you supply to use mobile phones or other digital products is excessive electricity to make the lithium battery inside the mobile power automatic protection, so the need of a computer USB output port to charge him on it. 

Will not boot: 
Mobile power switched mode with the phone lock key like, we need to long press 2-3 seconds, or wait a few seconds to see the long battery indicator light flashes regularly, on behalf of mobile power has been switched to the mobile phone or other digital products charged.

With the rapid development of the global economy, people's living standards continue to improve, carry-in, more and more electronic products, such as notebook computers, tablet computers, mobile phones, digital cameras, camcorders, portable DVD, PDA, MP3, MP4, GPS, thermal equipment, healthcare equipment. However, these devices will be the first wife battery because the battery capacity is low and can not meet the normal use of the device time. Mobile power emerged. With mobile power can solve many mobile device's power supply problems in order to solve the shortage of bitterness. Some products available in the market of high capacity, unit capacity of up to 8000mAh, intelligent battery indicator, Japanese pinnacle of power management technology, the use of polymer lithium-ion batteries, widely used 5v devices. 

Mobile power security is constantly taken by the people of the problem, but the chaotic situation in the market of mobile power factor is also more and more insecure. Mobile power must have: short circuit, overcharge, over discharge, constant current, constant voltage and other protective measures, there should be high-performance power management technology. So as to make buy the rest assured that with the peace of mind. 

Mobile power is a set of rechargeable batteries, boost, charge management in one of the portable devices. Chu dielectric generally use lithium batteries, lithium batteries because of relatively small size, large capacity, broad market liquidity, affordable, is widely used in digital products. Lithium voltage between 2.7-4.2V, the voltage drop along with a decline in consumption. The 2.7-4.2V voltage can not be directly charged to other digital products, digital products lithium because the voltage is 2.7-4.2V, the voltage potential between the same can not be charged.Therefore, the output power is outwardly mobile power boost system must be put voltage of 2.7-4.2V lithium boost to 5V, so you can charge it to other digital products, such as mobile phones, MP4, Tablet PC, PSP and so on.

Of course, the mobile power is not a one-off device, which can be reused hundreds of times. So when power mobile power after use, we must give mobile power charging. The principle is the same, and to charge the phone. Connect to 5V USB computer interface or USB Power Charger for charging mobile power. Therefore, there must also be an internal mobile power charging management system. Rechargeable lithium battery management system according to the voltage automatically adjusts the charge current. Process are: pre-charge, constant voltage charging and floating charge and so on. 

Mobile power is composed of three parts, batteries part, the circuit part (booster systems and charging management system) and the housing section. The following describes each component. 

Mobile Power Batteries: 
Batteries are a core part of mobile power, mobile power is the power storage, in fact, is the battery. Commonly used polymer lithium battery, 18650 lithium battery, AAA NiMH batteries. 
1 lithium polymer battery: standard voltage 3.7 V, the shape more, can be customized, with large capacity, inexpensive, widely used, such as: mobile phone, MP4, portable speaker. Polymer lithium battery is a kind of aluminum flexible packaging used in the structure of lithium-ion batteries, it is more than metal casing batteries safer, does not occur when working at high risk security risks. Its charge density, thickness is smaller, lighter, while the capacity is great, a lot of mobile phone battery is made using polymer batteries. Its resistance is small, even less than 35mΩ, greatly reducing the battery from the power, making the higher utilization of electricity. In addition, the shape can be customized, tailor-made according to the appearance of the shell, a lot of the appearance of small mobile power are based on flexible batteries. 

2.18650 Lithium Battery: Standard voltage 3.7V, with small size, large capacity, mainly used in notebook computers and other high-end products.18650 is a steel, aluminum batteries, and its technical aspects are relatively mature. 18650 having a diameter of 18mm, a height of 65mm cylindrical battery, the capacity is usually between 2000-3000mAh. Mobile power in the market most of the 18650 are using lithium cobalt oxide used as cathode material for batteries, its single nominal voltage of 3.7V, the charging voltage of 4.2V. Such batteries Compared to the previous nickel-metal hydride and nickel-cadmium batteries greater capacity, longer life expectancy, the number of cycles of charging and discharging can reach more than 500 times, and higher safety factor, non-toxic and environmentally friendly. 

3. AAA NiMH batteries: Standard voltage 1.2V. Capacity is relatively small. Should be widely, household appliances, and other players. 

Boost System: 
Boost mainstream technology basically uses DC to DC boost mode.Conversion efficiency of domestic technology generally low, generally in the 50-70%. In 75-80% of Taiwan. The United States will be relatively higher. Also there is relief programs, the efficiency is relatively high, but the consistency of batteries with high requirements, so rarely used. 
Depending on the product supply output power conversion efficiency calculation: 
5000mAh mobile power with an example: the actual output capacity = (mobile power capacity 5000mAhx3.7Vx conversion rate 85%) / 5V = 3145mAh 
Charge Management System: 
Currently charging management system is relatively mature, intelligent IC monitors the entire charging process. Mainstream Management IC with PT4056, PX40, etc. Charge time 5000maH about 8 hours. Fast charging of the battery life has adverse effects. 
Housing: 
1 plastic shell: Average mobile power are ABS / PC-based materials. 
(2) Metal shell: Aviation aluminum shell.

This is also a lot of consumers or users to buy mobile power charging treasure more concerned about a problem, mobile power network i also often receives consulting QQ users, mobile power quality how? Mobile power network special launch this small article to help consumers understanding these common knowledge points.
Mobile power product quality is mainly affected by two main factors:
1, batteries. Batteries are the main core of mobile power, batteries generally use 18650 and polymer batteries. Their raw materials are the same, 18650 is a liquid lithium-ion polymer battery is a paste.

18650 more well-known manufacturers are Sanyo, Panasonic, Samsung, in addition to domestic 18650.18650 18650 divided into imports, domestic 18650, and often heard to disassemble, used 18650.

Polymer is more famous ATL, BAK, B & K, the work of God, Hercules, BYD these. In which the electric wire core factory and more. Interested users can be related to the search.

2, PCBA protection board, lithium batteries are 3.7V voltage, and mobile power supply output voltage is 3.7V, here's a step in the process, then there is a protection board PCBA called MCU's components, it is responsible for the boost Likewise when we connect the AC switching power supply, 220V voltage to drop into a 5V input. This PCBA protection board are at work,

This is a relatively large one PCBA protection board, some not so big, according to the mobile power shell size and have different looks.
So if these two components did not do it, it will affect the quality of mobile power.

Currently smartphones become Tu fire potential, more and more users are buying ditch smart phones, smart phones two most prominent feature is the large screen, games and more, then the battery has become a bottleneck, we can say now No matter what kind of smart phones, the most depressing thing is the battery enough. Therefore, the emergence of mobile power just to solve this problem.
Choose from a mobile power users with the machine, it can be started from two aspects to determine their purchase intentions.

1, from the capacity, the capacity and volume proportional to the greater capacity, of course, greater capacity, and that you can be considered good, but a little bit to get the body weight oh.
2, from a suitable point of view, easy to carry and beautiful appearance is one of the most important factor.

So you can choose 4000-8000mAh mobile power, suggested the use of polymer batteries. Also try to pick the brand.