Leading to teach you how to choose and buy mobile power
From the perspective of the internal structure of mobile power supply, mainly by the lithium battery, protection circuit and PCB, and advantages and disadvantages of a mobile power supply is indicated by the two parts. From the point of view, the purpose of the main use is that storage capacity and provide power batteries, battery quality is hard to go to identify from the surface, no one can be certain between different brands of batteries will there is a huge quality difference, unless adopt prolonged cell aging test. And PCB's responsibility is larger, the circuit board is responsible for the actual conversion efficiency of mobile power supply, various protection mechanisms and output effect, can charge for the design of circuit board directly decides the mobile power supply quality of the output. So if a mobile power supply PCB circuit boards used the good workmanship and design, at the same time use the batteries is more outstanding, and has a solid protection circuit, then the quality of mobile power supply is secured.
Consumers, of course, is not privy to the mobile power within. Don't consider the capacity of mobile power supply, from the perspective of consumers, can simply think: a consistent battery can actual capacity and nominal capacity, high conversion efficiency at the same time, with all kinds of reasonable protection mechanism, aging and decay slower mobile power supply, is a good mobile power supply.
First, look at the batteries. Mostly mild package lithium-ion batteries, and 18650.
Soft package lithium-ion batteries, also known as polymer batteries, as a kind of battery is squishy, can be made into various shapes, so the industry is called soft package. Its capacity is calculated by a mathematical formula, the appearance of soft package on the market more beautiful rich individual character. Safety factor is higher, but get a package, relatively bigger risk of burning.
18650, liquid lithium battery, 18 and 65 indicates the size of the batteries, 0 indicates it is cylindrical. Large capacity, up to 3000 mah but may have exploded, safety coefficient is low. If with the packaging protection board, the explosion probability will be greatly reduced.
Second, the protection plate. Protection board is to be able to automatically adjust when excessive power charging or discharging, automatically shut down after the electricity charge function. Protective plate can improve the conversion rate, reduce the influence of charging by resistance.
Third, the outward appearance. Believe that appearance is a lot of friends when the choose and buy mobile power supply one of the primary factor. Fashionable appearance can increase a lot of fun. The same volume capacity is higher, the shape of a small can highlight the portability of mobile power supply and increase the practicality.
Fourth, the electrical parameters:
General requirements: 1. The charging voltage current charging voltage 5 v, universal mobile phone adapter. Charging current theory is the bigger the better, the faster recharge. The actual heating problems should be paid attention to.
2. Batteries capacity: general capacity of batteries is with is proportional to the size, the bigger volume capacity. As far as possible with large capacity under same volume products. 3. The output voltage, output current, output voltage must demand 5 v. The discharge current theory is the bigger the better, the faster recharge. Should be paid attention to the actual heating problems and the characteristics of digital products.
4. The protection parameters. Should have over voltage, over current, under voltage protection, etc. These parameters determine the speed of mobile power charging, charging time and the safety of the use, for everyone has a lot to do everyday use.
5. Select batteries, batteries is the most important part of mobile power supply, batteries, the quality of the basic means of mobile power products quality, so it is the primary choice. Rechargeable lithium ion batteries have the several on the market, polymer batteries, batteries, aluminum shell, batteries, steel shell cylindrical metal case batteries (the most commonly used is 18650 cylindrical batteries), aluminum batteries are mainly used for mobile phone batteries, batteries steel shell is too low-level basic need not, is mainly used as mobile power polymer batteries and cylindrical batteries, relatively speaking, cylindrical batteries cost lower price, but the performance of polymer batteries will be better, capacity and discharge platform and is better than the cylindrical cycles, the most important thing is that security is better than cylindrical batteries, polymer batteries, polymer batteries is aluminous model membrane shell, no matter what circumstances are not exploded, and cylindrical batteries is the metal shell exploded once the charge and discharge is likely to be abnormal, the user's body damage. It exploded and mobile phone batteries, is unable to stop, can only reduce the probability of this happening. Mobile power supply, therefore, had better choose polymer batteries, no need to bring a mobile power supply to the explosion risk.
standard
1, the preparation before the choose and buy, also is to preliminary positioning capacity and brand. Before the choose and buy mobile power supply, the first thing we want to combine their own needs to consider a few questions: what is specific purposes, is used in what occasion, is the need to short time of emergency, or as a long time to go out and set aside. If it is used for emergency charging, then select the product that is relatively small, easy to carry such products, can also be in charge of the phone at the same time, but the batteries capacity is relatively small. If it is used for outdoor use for a long period of time, you will need to some of the great capacity of batteries products, such products are relatively large, is not very convenient to carry. Of course there are also some medium volume, appearance of fashion products, maybe on the subway from work or on the train home use is a good choice. As for brand small make up feel to choose the brand with quality assured, good public praise, can go to professional rankings, of course, look at moving power meter recommend network also provides you with each list, and the comparison between Tmall mall sales.
2, energy storage medium of choice. Orders, mobile power supply mainly adopts batteries, nickel metal hydride batteries, lithium iron phosphate batteries, liquid lithium ion batteries, lithium polymer batteries. Mainly sells on the market after the two batteries, you can't choose two batteries before use products, these two kinds of batteries, the output efficiency is very low, do not have any advantage, don't buy. Liquid lithium ion batteries and lithium polymer batteries are relatively smooth output efficiency, especially compared to lithium polymer batteries liquid lithium ion batteries with light weight, safe and efficient characteristics.
3, determine the conversion rate. Mobile power conversion rate is very important, if the conversion rate is too low, it shows that mobile power line loss will be very big, may be fever, even with explosion danger. Can conversion rate of the mobile power supply model of evaluation, the AD if claim conversion rate as high as 90% above, are likely to be false, the overall conversion rate at about 85% of the product has a very good job.
4, product compatibility. Mobile phones and other electronic products are diverse, circuit design and the interface is not nearly the same, the same mobile power can't be suitable for all electronic products, so must clear before buying their own electronic products required interfaces, the information such as voltage, if you can try to counter of commissioning. General mobile phone charging voltage current is 5 v1a, if your phone is more special, interface to merchants and confirm it.
5, products, accessories and additional functions. Although the mobile power supply main function is to charge, but some additional features will bring more benefits to us. For example, there are multiple charging adapter can extend the use range, double interface can recharge two electronic products at the same time, along with LED light can be emergency. Additional clear, some mobile power with solar charge function, this is actually a chicken ribs, because many users found that after using solar charger can't charge, basically time is too slow.
6, product appearance, and weight. According to the using occasion, it is necessary to select type of the mobile power supply. Simple emergency use should choose small mobile power, standby power supply capacity should be selected out of mobile power supply, the same function of the product, should try to select the product of light weight, convenient to carry.
7, try to choose the brand products. A brand advertising is an important, need more word of mouth. Choose more awareness of mobile power supply, the product quality could be better, after after-sales service in place.
