The following precautions are just for reference, if you need to understand the specific use of mobile power and precautions, you would better see the relevant instructions and there will be a more detailed description above.

The precautions are as follows:
1, Do not drop, knock, or shake the Iphone External Battery
2, do not place the mobile power into the water 
3, we should avoid exposing it under the sunlight or rain for a long time
4, do not store or carry flammable liquids, gases or explosives in the vicinity of mobile power.
5, only the "CBA" original mobile power charger can be used. The use of other electrical will easily damage the mobile power, or cause overload, and it may cause damage to your battery.
6, place the mobile power in a dry place when it is not used, and avoid being contact with metal materials for the occurrence of unwanted circuit.
7, do not place the power supply on the high or low temperature environment, which can lead to the automatic protection function and automatically interrupt the power supply.
8, the mobile power should be stored in the place out of the reach of children to avoid accidents,
9, Do not disassemble the damaged  portable external battery charger. If the battery liquid contact your skin, please wash it immediately and contact a doctor

Although the above description is not very detailed, the basic usage and precautions are provided, and we will find some more detailed mobile power usage and precautions for you latter in order to make everyone use the mobile power in a better and safe way. In addition, I hope you also provide some experience in the use of mobile power.

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1. Linear charging external battery charger: it adopts pure resistance current limiting or charge management chip to reduce voltage. It reduces input 5V voltage directly to voltage required by the battery, and limits current through audion amplifier or comparator amplifier inside the chip. It enjoys the advantages of short development period and quite high success rate.

Disadvantages

First, this line achieves purpose of voltage reduction and charging through the linear stable voltage constant current for the excess energy consumption. The temperature is very high and the charging current can not be large. That is because the larger the charging current is, the greater the energy consumption will be and the larger the heat radiating area will increase.

Second, the rechargeable battery of this line is easy to polarize. The larger the charge current is, the greater the polarization area will become, and the lower the capacity will be. After a long time, the battery will lack of capacity. The best way to reduce polarization is to charge after using up the battery power. Reducing the times of battery charging is to longer the battery life (polarization refers to that the oxides accumulation hampers electrons migration). Linear portable external battery charger normally has three processes: constant current, constant voltage, and trickle charging.

2. Pulse portable external battery charger: it uses CMOS electronic switch, reducing voltage and charging by constant current through controlling the switch, also called PWM control charger. During the control process, gets data from CPU port detection for calculation, feedback and adjustment of PWM width and frequency to complete the charging process. Its disadvantage is that this line technique is very complex. Pulse external charger typically has four processes: trickle charge constant current, express charge constant current, trickle charge with repairing.

Advantages

First, high efficiency

This line controls current by electronic switch, which is theoretically lossless, low temperature, and fast charging, because low temperature is easy to reach the fast charging purpose.

Second, long battery life 

To prevent causing polarization affecting life of the battery during the charging process, it use pulse-type charging with rest repair process, getting better throughout the charging process of the battery power absorption.

www.external-battery.net, established in 2005, is the subsidiary company of Global Vision Group (HK) limited. We are a professional and famous wholesale power bank manufacturer and exporter in China. With our own professional R&D center, factory and marketing team, we devoted ourselves to offering customer with innovative 3C products.

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As people's living standards continue to improve, variety, versatile types of digital devices into the household, people are enjoying the convenience brought by scientific and technological progress, it is also for the digital device itself endurance worry about the problem of inadequate . In order to solve the digital device comes with less power problems, designed for mobile phones, tablet computers and other equipment designed for charging mobile power products have emerged.

Mobile power brand on the market dazzling, people buy mobile power when the product packaging or by viewing the instructions on the product parameters to determine the product quality is better, usually product volume, batteries, capacity, voltage and current, conversion rate and other data are all part of the inspection, but little difference in these fits many tricky hidden data, from which the average consumer is difficult to find the problem, and today we'll introduce some information about the basic knowledge of mobile power .

Mobile power appearance and weight are the primary consideration when many users choose one of the factors. Pretty stylish appearance not only enjoyable, but also for everyday use to add a lot of color. Compact body is relatively light weight, portability has been improved, users in their daily activities can be very convenient to carry, to increase usability.

Currently on the market mainstream mobile power products shell material, there are two, namely, plastic or other fireproof materials ABS + PC plastic material, aluminum or aluminum alloy metal material. Plastic shell usually through piano paint treatment process to increase the aesthetics and comfort, relatively light weight; metallic casing will generally be brushed or matte process, increasing the metal texture, but also enhance the beauty and feel of the fuselage, relative weight will be slightly heavy.

In general, the volume of mobile power body weight with batteries capacity is directly proportional to the volume the greater the greater capacity of the volume is also heavier, more light and vice versa. Public about the user selects capacity batteries 5000mAh mobile power can basically guaranteed to charge the phone battery life, and the smaller, more portable to carry it; 10000mAh more mobile power capacity batteries on the size and weight is relatively large, and users in the can be carried out on the package, suitable for Tablet PC users are used; notebook computer users generally have choice about 20000mAh mobile power to ensure that the device provides a more lasting power support, of course, these are just a reference proposal, in actual use , users of the device, charging times and using different methods, we still have to combine their actual situation to choose mobile power capacity.

With a variety of smart phones, tablet popularity, more and more people are discovering all kinds of digital products, especially mobile phones have been unable to meet their own electricity use for our daily life needs, and can say that the emergence of mobile power to a certain extent to solve this problem. So for those who do not come into contact with consumers, mobile power, an array of mobile power how to choose it?
The power, the key will have to see batteries. Mobile power internal batteries is like a car's fuel tank and transmission, is responsible for the entire endless power mobile power, mobile power directly determine good or bad. Mobile power board can be seen as the control system is mainly responsible for the distribution of power and the conversion, the lithium batteries are provided 3.7V (or higher) voltage is converted into a standard 5V (or higher) voltage to was to provide electricity for the charging equipment.
The current mobile power batteries generally use lithium-ion batteries, but the performance varies, but is from the shape does not look like, and generally can not be reflected in the specification label. Here we start from the batteries, step by step to explore the mysterious world of mobile power.

Lithium-ion battery electrolyte according to the different materials used, can be divided into liquid lithium-ion battery (LIB) and lithium-ion polymer battery (LIP) into two categories. Both positive and negative materials used are the same, including lithium cobalt oxide cathode material, nickel-cobalt-manganese and lithium iron phosphate materials are three extremely negative graphite, battery works are basically the same.
The main difference lies in the type of electrolyte, wherein the liquid lithium-ion battery using a liquid electrolyte, lithium ion polymer batteries places instead of the solid polymer electrolyte. Such polymers may be "dry state", it can be "colloidal", and now most use of polymer gel electrolyte.

Lithium cobalt oxide is known to everyone in liquid lithium-ion battery, a common morphology 18650 and squares shapes. 18650 is the diameter 18 mm, height 65 mm cylindrical battery (looks like a larger version of the 5th battery), widely used in laptop batteries. As with the universal laptop battery, now available in more than 60% of the mobile power is also used in 18650.
Current commercial lithium ion batteries are basically optional layered structure lithium cobalt oxide as the positive electrode material, the theoretical capacity of 274mAh / g, the actual capacity of 140mAh / g or so, there are also reports the actual capacity has reached 155mAh / g.
The higher operating voltage cathode material (average working voltage of 3.7V), charge and discharge voltage stable, small size, high specific energy, cycling performance, high conductivity, the production process is simple, easy to manufacture.
Main advantages: mature technology, wide range of applications, compact size.
The main disadvantage: about 300 times cycle life, low security, anti-overcharge poor, not suitable for high-rate charge and discharge, pollution of the environment after disposal.
Two, nickel, cobalt and manganese (LiNiCoMnO2)

Nickel, cobalt and manganese, also known as ternary material (LiNiCoMnO2), is a polymer lithium ion battery, a common form of soft pack box shape. Notice can also be made of lithium cobalt box shape, but after forming a hard, Yong Shounie click to distinguish them.
Ternary materials with the popularity of smart phones to the rapid development in recent years, the use of more and more areas. It nickel salt, cobalt salt, manganese salt as raw materials, nickel-cobalt-manganese ratio can be adjusted according to actual needs.
Ternary materials made with respect to the positive battery safety lithium cobalt oxide, lithium cobalt oxide higher than life, reaching 500 times using life cycle.
Key Benefits: Volume diversity, the use of a very wide range, not an explosion, high safety factor.
The main disadvantage: higher prices, after disposal pollutes the environment, high-current charge and discharge performance is weak.
Three, lithium iron phosphate (LiFePO4)

Generic ferroelectric lithium iron phosphate, with the previous two batteries biggest difference is added to the iron battery positive. Lithium iron recent years has just started, is a promising material, its safety performance and cycle life are unmatched by other materials, these battery power is also the most important technical indicators. Charge-discharge cycle life up to 2000 times, single battery charging voltage 30V no burning, no explosion puncture.
Lithium iron phosphate cathode material to make more large-capacity battery pack used in tandem to meet the electric car needs frequent charging and discharging, and has a non-toxic, non-polluting, good safety performance, wide range of sources of raw materials, cheap, long life and other advantages, is ideal for a new generation of lithium-ion battery cathode material.
Currently ferroelectric with large capacity electric bus, signal the base station based energy storage and large UPS applications, including mobile power, AA batteries just beginning to test the water mass production, which makes the ferroelectric phase in large-capacity UPS, compact storage batteries , lawn, electric tools are widely used.

Today, the market for mobile power brand are numerous, for ordinary consumers, not afford to purchase its technical evaluation or screening, only by virtue of what they saw and heard the knowledge to pick, then in the end how buy it? This reporter interviewed the electronic market sales staff.

First, do not buy special low price mobile power. In the purchase, "penny stock" This sentence must be placed on the heart. Of course, do not rule out the market there will be some high-quality products, or businesses for a better quality of products for promotion, but these are one example. Simply from the cost calculation, you can easily filter out some serious vacuity electricity inferior products. The current use of more mobile power 18650, for example, the capacity of single batteries in about 2500 mA or so, the price of 10-30 yuan range, plus housing, packaging costs and a reasonable profit businesses, the a nominal 10,000 mA mobile power price should be at least 100 to 200 yuan between. If it is some brand-name products, with R & D costs and brand value, the price is a little higher. This calculation, online sales of those so-called "monthly sales ten thousand", "30000 mA is also only 90 yuan shipping" propaganda to go too.

Secondly, try to choose big brand products. Mobile power supply in the final analysis, so the purchase can be first in line to look at the power of the enterprise information designed to do, these companies produce mobile power is trustworthy. In general, the production of mobile phone battery or batteries, lithium battery mobile power companies produce more trustworthy, and its product quality more secure. In contrast, those OEM, OEM manufacturers of products, as well as unlicensed product is not recommended for consumers.

Accustomed to looking online for mobile power evaluation, are needed specialized equipment to test out the products on Taobao, almost exclusively show appearance, something rarely mentioned on the inside, up to mention batteries, on the purchase of such something almost no help. The vast majority of Taobao sellers are not professional, many professional things they themselves are confused, so my brother from their own professional perspective to give us some information, hope that helps.
 
Decided to move the power of good and bad two major components: batteries and PCB board

Batteries: There are two kinds of 18650 and polymer, lithium cobalt oxide 18650 usually liquid lithium-ion polymer usually solid or colloidal nickel cobalt manganese ions. Click here for special instructions, 18650, is not so dangerous online said, this poor resistance to high temperature batteries in extreme high temperature circumstances will an explosion, and how to control the temperature, is that the PCB circuit design and the battery itself resistance heating, for a regular manufacturers of 18650 and a complete PCB circuit board, it is generally okay. Many laptops, rechargeable batteries, digital camera batteries are used in 18650, if it will explode at any time, it is not should all throw?

Common 18650 and polymer batteries, PCB board: with lots of small parts supply / charging chip, boost chip protection circuits, capacitors, etc. These small parts for battery conversion rate and discharge stability plays a key role in the quality of these functions need to use specialized equipment to test it out, we can see that the circuit is clean, the layout is reasonable, there are good and bad capacitor, the capacitance of the most widely used at present, there are three: electrolytic capacitors, tantalum capacitors , ceramic capacitors, in ascending order of quality, are currently used in most mobile power supply electrolytic capacitors, this capacitor in extreme environments easy to aging, breakdown, leakage, tantalum and ceramic capacitors this problem does not exist. Capacitors on the PCB's role is filtered to ensure stable output current, we can think of the current instability on the phone continue to charge what impact? Specific estimates can not tell, but the answer is definitely not good.
 
Suggestions:
1, try to choose the appearance of solid workmanship mobile power (personally think that if an explosion, or at least reduce the power point)
2, if you select 18650 mobile power, capacity options try not to over 12,000 mA, too, and in extreme cases, explosion up powerful, single cell made so as not to over 2800 mA, because the current domestic goods production process, more than this number of mAh battery in terms of anti-attenuation and dispersion to be worse.
3, try to choose a regular indicate the source of the 18650 and polymer mobile power, but at present there is little domestic battery manufacturers indicate the source, as long as the regular factory on the line, from the appearance, difficult to distinguish between polymer and 18,650, because many uses aggregation objects by multi-layered structure composed piece, but if the thin, must be polymers, too thick, although difficult to distinguish, but the price should be able to tell you some information.
4, do not be too superstitious sales on Taobao, Taobao sales of over a million are usually high-capacity, low cost, low selling price of mobile power, this part of the product by the majority of users blitz. We must remember that you pay for this sentence, it means that low-quality low-cost, domestic mobile power batteries are similar, and many manufacturers to reduce costs, the use of 18650 There are several extreme tactics:
1, the old batteries
2, poor quality batteries
3, PCB board materials and poor design is not complete and does not provide over-voltage, over-charge, over discharge, over current, short circuit protection, overheating and six basic protection functions
4, low capacity battery virtual standard capacity 18650 hundreds capacity to more than two thousand mA range, made 2000 mA or less is more stable, more than 2400 mA high price, if someone saw 2600 mA, the price is low, and that the basic part of this. .

1. Output voltage range of external battery. Although some devices have USB interfaces, they also need to be charged by your external battery. However, you should pay attention to the input voltage range of your devices. Output voltage range of universal mobile power is 5.3 to 0.5V. If the input voltage range your device requires is not within the output voltage of mobile power, then, it is recommended that you do not use the mobile power supply for your device, to ensure the life of your mobile external battery.

2. The USB interface must match the devices'. Because various USB have different data cables for devices, in order to properly use external battery for your device, please use the matching USB data interface.

3. The placing environment of external battery. Various electrical appliances need to be stored in a dry environment of small air humidity, and environments of high humidity are detrimental to the preservation of all kinds of electrical appliances. Therefore, for the life of your mobile power, please store them in a dry environment as possible.

4. Always use your mobile power. Charge and discharge your iPhone external battery once a month, and often use it. That may farthest extend the life of the external battery.

5, Drop resistance and shock absorption. Actually external battery is a fragile part, whose internal components cannot stand beating. In particular, prevent it from accidentally dropping. Do not throw, drop, knock or shake mobile power. Roughly treat mobile power can break the internal circuit boards.

6. Prevent cold and heat. Do not place the mobile charger on where there is under high temperature. High temperature can shorten the life of electronic devices, destroy mobile power, transform and meltdown some plastic parts. Do not put them in a cold place, either. When the external battery works in a cold environment, the internal temperature rises, moisture can form inside the mobile power and damage the circuit boards.

7. Prevent harsh chemicals. Do not use harsh chemicals, cleaning solvents, or strong detergents to clean the mobile charger. To clean mobile power skin stains, cotton with a small amount of anhydrous alcohol can be used.

www.external-battery.net is a professional and famous 20000mah external battery  manufacturer and exporter in China. With our own professional R&D center, factory and marketing team, we devoted ourselves to offering customer with innovative 3C products.

This article comes from:http://www.external-battery.net/news/55.htm

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.

www.external-battery.net lunched the external battery and Iphone power bank with fashionable designs, reliable quality and competitive price. At present, our product line has been expanded from the battery charger to mobile phone cases and accessories which are suitable for iPhone, iPods, iPad, smart phones, digital tablets and other portable devices. Our own brand "Sunwith" has won a great popularity and market share.

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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.