I want to buy a power bank and ask for a recommendation

I don't know what you can win these two models with? However, in my understanding, the 913 is a double port, and the V8 is a single port. If ** is the same, it is more appropriate to 913. If it's different, it depends on how you usually use it?

If you only charge your mobile phone, it is recommended that you choose the best product to be 913. Because the maximum current of the general mobile phone supports 1A, charging with the 2A port, if the quality of the mobile power supply is average, it will make the mobile phone charge to death (to be honest, the power quality of these two brands is average)!

If you only charge a tablet, you can choose Lijie V8. As far as I feel, the quality of Lijie is much better than Pineng. The power supply with high current output is still the Lijie insurance point.

Here's my advice, I hope it will be useful to you.

1.Generally, the original charger of the mobile phone is marked with the charging voltage and charging current, when choosing the mobile power supply, it is necessary to see that the output voltage of the mobile power supply needs to be consistent with the charging voltage on the mobile phone charger, and the output current must be less than the charging current on the mobile phone charger. The analysis is as follows:

In the case of not considering the charging current, if the output voltage of the power bank does not match the charging voltage on the mobile phone charger, the electrical stress of the device in the charging management circuit in the mobile phone will be too large, and the life of the mobile phone (excluding the mobile phone battery) will be reduced; In the case of not considering the charging voltage, if the output current of the mobile power supply is larger than the charging current on the mobile phone charger, the charging management circuit device in the mobile phone is too stressful at the same time, and the battery charging rate is also too large, which will reduce the life of the mobile phone and its battery, but the time to complete the charging will be shortened, without considering the charging voltage, if the output current of the mobile power supply is smaller than the charging current on the mobile phone charger, it is beneficial to both the charging management circuit in the mobile phone and the mobile phone battery. And the battery is easy to charge, but the charging time is relatively long. The above is the impact of the charging voltage and charging current on the mobile phone and its battery.

2.The power supply includes a battery and a charging conversion circuit, all the conversion circuits have conversion efficiency, the conversion efficiency of the circuit in the power supply is generally not more than 70%, that is to say, after the conversion of 1000mAh battery energy (that is, converted to charging energy), only 700mAh charging energy can be output, so the nominal battery capacity of the mobile power supply, the user thinks that the charging capacity, there is a conversion efficiency between them, The user should know that the charging capacity of the battery after this conversion efficiency must be lower than the nominal capacity on the product.

After answering these 2 questions, let's take an example, someone's mobile phone battery capacity is 1400mAh, the charging voltage on the charger is 5V 1A, and he wants to buy a power bank that can charge the phone more than 2 times. Then you can choose like this, first calculate the capacity of the mobile power supply according to the conversion efficiency: 1400mAh * 2 times 70% = 4000mAh, so you need to choose the nominal mobile power supply above 4000mAh, and then choose the mobile power supply, filter its parameters, and select the output voltage is 5V, and the output current is not greater than 1A.

1: There is no limit to charging the mobile phone with the power bank, it is generally 5V, so it has little impact on the mobile phone battery.

2: The power bank can fully charge the battery of the mobile phone, provided that your mobile power bank must have so much power in it, the capacity of the mobile power bank should be greatly discounted, I once bought two Empirehead ** mobile power bank 4800 mAh, fully charged the mobile phone, can only be fully charged once, the second time can be charged to 70% My mobile phone battery is 1750 mAh, that is to say, the actual usage is only 2900 mAh!

Summary: Personally, I think that the mobile power supply is not practical, so it is better for the landlord to buy a **mobile phone battery. It is inconvenient to carry the mobile power supply, and the volume is larger than the mobile phone, generally speaking, the mobile power supply is 3 times that of the original battery of the mobile phone.

Another point is that the power bank is not used frequently, usually go to work at home can not be used at all, I regret buying it, only when I go back to my hometown to use it once in the car. It is not a problem to choose a mobile phone battery for a day under normal circumstances. If you have 2 batteries, you can use them for 2 days without a problem, or even longer.

As for how to choose, it depends on the landlord.,If you want to experience it, it's okay to buy one.,The ** of the mobile power supply is generally within 200.。

The ** of the mobile power supply mainly depends on the battery capacity and other materials.

1. In terms of applicability and cost performance, it mainly depends on the battery capacity of the mobile phone, the power bank should boost its own voltage to 5V when charging the mobile phone, this process will consume part of the power, plus other consumption, and finally the power that can be charged into the mobile phone is about 60% of the total capacity, for example, a 10000 mAh mobile power bank can actually charge the power into the mobile phone is about 6000 mAh, and the 3000 mAh mobile phone battery can be fully charged 2 times.

2. If the mobile phone battery is 3000 mAh, it is recommended to use a mobile power bank of about 10000 mAh, charge it 2 times a day, whether it is used for travel or on the way to work, it is enough, you can also choose a 5000 mAh mobile power bank, which is fully charged once a day for people who do not play mobile phones.

3. If the mobile phone battery is a 3000 mAh battery, it is recommended not to use a mobile power bank with only about 3000 mAh, the power that can actually be charged to the mobile phone by a 3000 mAh mobile bank will not be 3000 mAh, it can only be charged to about 60%, and if there is more business, there will be no power.

Last week I bought a teleflash fast power treasure brand power supply, 5000 mAh, metal shell, hold in the hand has a weight, very high-end, take it out to have face, 199 yuan, my iphone4 charged three times, the power display has a grid, I feel that this brand of mobile power supply is more authentic. The question you raised, I will probably answer it unprofessionally, 1, the output of the mobile power supply is generally 5V-1A, and the brand mobile power supply generally has an intelligent protection circuit design, which has no impact on the mobile phone, but you must buy brand goods. 2, I have also heard of this, a friend bought a power supply called 4800 mAh, only charged once, it was basically used up, too garbage, this kind of deception of consumers, will be ruthlessly punished by the market, so we buy power supply try not to buy no brand three no products.

Personally recommend this kind of product of Pinsheng, you must choose a good one, that is, Pinsheng's easy to rush, can fully charge Nokia, the power must be completely real, buy it, no regrets.

150 can buy about 5000 mAh brand power bank. It can be recharged 2 or 3 times. Commonly used power banks are definitely not good for batteries.

Nokia is pulsed current, many mobile power banks are not suitable, you must ask clearly when buying.

I used a double power 4000 mAh and I can use it 3 times! Only 130

A great companion for smartphones!

Purchase guide: 1. First of all, choose a first-class one, and the quality is guaranteed after sale;

2. Choose one with more than four lights of power display, which is managed by software, which has an extra layer of protection and is safer.

3. Do not choose the highest mobile power supply with the same capacity, the production cost is basically the same, but the brand positioning is different, resulting in a large retail price difference;

4. Too cheap is unreliable, now there are many fake and shoddy products on the Internet, all of which are falsely marked with capacity, which looks cheap, but in fact, not only the quality is not guaranteed, but the capacity is less than half;

5. A few must-ask questions: aHow many times can this power supply charge my xx mAh phone battery?

b.How long does it take to charge itself? c.

How long does it take to charge my iPad? These three questions are to estimate whether the capacity is false, whether the input current is false, and whether the output current is false. Moreover, it does not need to be taken apart to verify;

6. The capacity should not be too large, and it is better to be fully charged in one night, so that it will not affect the next day. If you really need a large capacity, it is better to buy two, which is more convenient;

7. If there is a clear way, choose a steel shell cell with ternary cathode material, such as the 18650 model, which is as safe as the soft-pack polymer, and the failure rate is lower. Because the polymer cells of the pouch are easy to be extruded and deformed, which affects the performance;

8. The steel shell battery cell of lithium cobalt oxide cathode material is best not used, and the one with the worst safety performance is the one that has happened before. (Now the country's five major battery cell giants, especially Samsung and Sanyo, have all used lithium cobalt oxide as cathodes, and all use ternary materials).

Power bank. A few good brands!! One is Pinsheng, and there is the large capacity of Lizhong, which is about 280 for 9600 mAh, and it will not be higher than 300

1. With a monster-level capacity of 9600mAh, it is enough to make your digital equipment available at any time, anywhere, and at will.

2. Slim and fashionable appearance, unique Chinese red style, length, width and height only: 120mm x 75mm x 15mm (more fashionable and light) easy to carry.

3. Fully consider your safety, equip the latest lithium-ion polymer cells, and there is no hidden danger.

4. With full compatibility function, whether you are any brand of mobile phone, handheld, *** mp4, digital camera and other digital devices, the battery life master can be compatible one by one.

5. Powerful protection function, independent cell intelligent protection, charging overvoltage protection, discharge short circuit protection;

6. International brand A-grade lithium-ion polymer cells, ultra-long service life; There is no memory function, and the power is still maintained at more than 80% after 500 cycles of repeated charging and discharging. A full charge of 9600 mAh and a full discharge of 9600 mAh is a cycle, which is enough for you to use for more than 2 years.

7. High conversion efficiency: the power conversion is up to 90% under the rated power. , which is much higher than the 80% efficiency of other brands of mobile power supply, more energy-saving and environmentally friendly;

8. It has the function of self-sleeping, when there is no current output at the output port, it will automatically sleep. Self-power consumption of 20UA during sleep, no need to worry about the battery cell running out of power after long-term placement; When a device is in use, the current output will be automatically adjusted, making it truly plug-and-play.

9. After 72 hours of aging test, it is more safe and reliable. The performance and stability far exceed other power bank brands.

10. It is more easy to use, no need to make various settings, just select the corresponding joint, and it can be easily used.

11. Use while charging, you can also use power for your digital love device while charging the battery life master.

I don't know much about 15000 mAh Patriot is also good You can consider it It may be a bit expensive.

At present, the best power bank is impossible to charge a laptop, and the power supply of the laptop is relatively high. The voltage of the mobile power bank is not enough. Now the best power bank is Pinsheng, and it is generally used when playing SLR.