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Home > News > How to choose a power bank ?
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How to choose a power bank ?

Power Bank is a device could charge mobile devices directly and has its own power storage unit . At present, the market's main categories of versatile charging treasures, the basic configuration of the standard USB output, can basically meet the current market common mobile device mobile phones, MP3, MP4, PDA, PSP, Bluetooth headset, digital cameras and other digital products.

With the increasing popularity of smart phones, the battery will not be durable after a long time, and the power consumption is also increasing. Some mobile phones will be charged three to five times a day, especially when going out, so it is very necessary to use the power bank , It is also important to choose a good charging treasure. Let's talk about how to choose a durable charging treasure!

First of all , the power bank should has complete information such as product name , mode , rated capacity , battery capacity and so on . second , Then the manufacturer or trademark of the power bank must have , Secondly, the input and output ports must have the name of the port and the rated voltage and current value, and the package should also be marked with basic information such as safety warning and production date.

Look the battery core

Ordinary lithium battery and polymer battery , choose the latter , polymer batteries, lighter, no explosion, while ordinary lithium batteries, heavy, and may explode.

◆ The advantages of ordinary lithium batteries are: because the development time is relatively long, the price of the battery is very low. Disadvantages: There are more batteries for overhauling, and the problem rate and failure rate are high due to process reasons. It is bulky, heavy, has a short service life and may cause an explosion. This is a very fatal disadvantage, and mainstream mobile power supplies are gradually phasing out such batteries. In the future, the ordinary lithium battery will gradually withdraw from the stage of history.

The advantages of polymer battery: the battery capacity is strong, the capacity is large, the same volume of polymer battery is 20% larger than the capacity of lithium battery. The battery life is strong under steady current output and the surface is flexible material as the outer box. A short circuit causes the battery to swell and does not explode, it only breaks and is safe.

Look at the capacity. As we all know, the larger the capacity, the longer the standby time of digital products. Many products on the market have exaggerated phenomena. Nowadays, 2w mAh is popular. Therefore, it is recommended that you do not to buy at random, you must go to the regular store to buy, such as some large shopping malls. If you are going online to buy, you must go to a regular high-credit website to buy.

Look at the conversion rate. One of the cores of mobile power is the high conversion rate. The charging times of a battery due to the circuit board conversion rate and the battery core capacity , if the battery core capacity is large while the circuit board conversion rate is low the charging times is still low , on the opposite , if the battery core capacity is small while the circuit board conversion rate is high the charging times is also more . A typical product conversion rate of 85 percent is high without professionally tested equipment. The specific formula for conversion efficiency is:

(actual discharge capacity × average discharge voltage) / (cell capacity × 3700 mV) = conversion efficiency

Give an example to illustrate: The nominal battery capacity of a mobile power supply is 8400mAh, and the actual discharge capacity measured at the 5V output interface is 5318mAh. The discharge voltage of the whole process is above 5V. We temporarily set the average voltage to 5V, then its conversion rate is for:

◆(5318mAh×5000mV)/(8400mAh×3700mV)=0.8555(85.55%)

A mobile power source with long battery life and is not virtual capacity marked must have a relatively high conversion efficiency. Those who are interested can calculate it by themselves.

Look at the material .the key components in the internal structure of the mobile power bank are made of imported materials or domestic materials. Such as boost system, capacitance and so on. (Many businesses, in order to maximize profits, do not produce products according to standards, but cut corners. If the products such as power supply are not qualified, there will be great safety hazards for consumers. Therefore, it is recommended that when buying a charging treasure, you must pay attention to whether its material is brittle or not. Is there a detailed description on the manual, whether the product specifications and production address are the same as those of the power supply, and whether it has obtained the corresponding qualifications of the country. )

Look at the brand. There is no real brand for mobile power. The main reason is that the real hot time of mobile power is short. It is too early to talk about the real brand. Now there are many new mobile power brands with good quality. Refer to the mobile power brand, mainly Taking into account the large sales volume of these manufacturers, production and product quality will have a professional quality control and detection mechanism, but only for reference, not as a key reference factor.

Look at the charging method. Most of today's mobile power supplies use ordinary linear charging management. This kind of charging management method is too old to keep up with the times. The large-capacity charging treasure is full of electricity for 15-20 hours to fill, if it is charged for one day. Are you still willing to wait, the answer is definitely "not waiting so long." Today's smartphones are equipped with pulse charging management. The pulse charging management has many advantages such as large charging current, low temperature and long battery life. Of course, I am shopping for efficiency, and the charging treasures are more urgently used.

See compatibility. Support multiple brands of mobile phones, handhelds, MP3, MP4, digital cameras and other digital designs. Due to the specific circuit design, it is impossible for the product to support charging for every electronic product. The specific approach is to bring the commonly used electronic products to the counter test machine, so although it is not guaranteed how good his compatibility, but at least not to buy things that can not charge themselves.

Look at the features of the product. There are many special features, such as anti-reverse circuit design, which can protect the product from damage. The dual interface is designed to ensure the need to flush multiple electronic products at the same time. You can purchase products with different functions according to your preferences.

Determine the location of the purchased product. For example, if you are traveling for a long time, backpackers should consider buying large-capacity products. If you go out to prevent the phone from running out of power, a medium-sized and compact product will be the first choice. There is also a mobile power supply specifically designed for the iPhone.

Pay attention to the weight of the product. We often have such an experience. It is not a very heavy thing. If you take it for a long time, you will feel extremely heavy. The same is true for mobile power with a weight of 100g-200g. It is a good choice to choose a lighter weight product in the same capacity.

Look after the sale. Everyone must ask the mobile power charging treasure you purchased, whether there is a complete after-sales service. In general, a well-known brand or a well-known online store has a complete after-sales service. When you have a problem with the charging treasure we bought, you can avoid a lot of trouble.

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