The competition in the mobile power market is becoming increasingly fierce. Whether it is Xiaomi mobile power products with high cost performance ratio or old brand Jinlv Pingsheng, Patriot, Yubo, etc., they have launched more competitive mobile power products. The lasting price war has brought economic benefits to consumers on the one hand, and caused the emergence of a large number of fake and inferior products on the other, The huge market share makes some fake power manufacturers take risks. Sometimes consumers need to pay a lot of energy to choose a genuine product. The product obtained by the author belongs to Shenzhen Douneng Technology Co., Ltd. After a period of trial and actual disassembly testing, it was found to be a conscience quality charging treasure with sufficient materials and powerful functions.

After unpacking the outer package, we can imagine the size of the Douneng mobile power supply by comparing the front of the Douneng mobile power supply with the cigarette case. On the left side above the front of the Douneng smart charger is the sound port of the buzzer, which is used to send out various alarm sounds. At the bottom is the logo of Douneng Power Bank.

There are three 120 degree surround sound holes in the upper left corner of the Douneng Smart Charger, which are mainly used for the daily warning function of the Charger. If the connection fails suddenly, an alarm will sound. When the APP performs relevant operations, the corresponding warning sound will also be emitted from the sound hole. This design is located above the shell panel, which is perfect with the overall design without any abrupt feeling.

The Douneng LOGO, which is located in the square under the Douneng Smart Power Bank, is made by the drawing process. Since the shell is made of aluminum, the drawing design makes the Douneng LOGO clearly visible. At the same time, it highlights the excellent manufacturing process of Douneng Smart Power Bank. Compared with the direct silk screen of some products, it is easy to wear off. The drawing process makes these problems not appear.

The back design of Douneng Power Bank is made of plastic, but the shell is smooth as silk, looks like a mirror, and the production process is meticulous. The logo and slogan of the power bank are on the top, while the technical parameters of the power bank and the QR code download address of the APP are on the bottom. There is no need to worry about not finding the manual and the APP download address, because it is also carried with you. On the top of the back of Douneng is Douneng's logo and simple slogan. From the actual configuration, Douneng Power Bank has Bluetooth hardware functions as standard, which makes it possible for Douneng Power Bank to expand and add new functions in the future.

The technical parameters of Douneng are clearly marked at the bottom of the back of Douneng Power Bank, but it is a pity that only the technical parameters of charging and discharging are marked here, and the Bluetooth function, an important function of the smart power bank, is not involved. We can clearly see that the capacity of Douneng Power Bank is 5000mAh, which is slightly insufficient for the current market situation.

For the Bluetooth function of Douneng Power Bank we just mentioned, there is a relatively clear identification on the label on the outer package. It can be seen that Douneng adopts the 4.0 Bluetooth standard. For the plastic color, Douneng can choose black and white. The white version is available to the author. For the color of aluminum alloy, there are three different options: gold and silver powder, The battery used by the author is silver, which is one of the guarantees for the safety of polymer batteries, just like most power packs. The capacity of the power bank is 5000mAh. For the increasing battery capacity of digital devices, this capacity is obviously slightly lower, but it also brings some advantages, that is, Douneng can do it more easily to carry. In terms of charging current, when all conditions are met, the maximum charging input current of Douneng Power Bank can reach 3A. If it is fully charged, it can be fully charged in less than two hours. The charging speed is relatively fast, which may effectively meet the fast-paced lifestyle of everyone. The output voltage is a DC5V output voltage, and the maximum output current can reach 1.5A, which can meet the charging needs of mobile phones and tablets.

For the interface part of Douneng Power Bank, the charging input port is designed as an input port of USB3.0, which can effectively increase the cooling area when using 3A high current charging. The charging output port is a standard USB output port, but unfortunately, Douneng Power Bank only has one USB output port.

There is a button and LED indicator on the side of the Douneng Power Bank. The LED indicator is displayed by a blue and a red patch LED. The button has the power on and off functions of the power bank, the function of Bluetooth self timer button, and the function of wakening the phone by pressing the button to make sound to prevent loss. One button multiplexing can achieve multiple functions.

Douneng Power Bank and other mobile power supplies adopt the same way. Switching power supply is an optional accessory. At present, people usually have multiple charging heads on hand, but it is estimated that the one that can achieve 3A current output should not be. Douneng Technology has provided a charging head that can achieve DC5V/3A output for Douneng Power Bank, matching a wide voltage AC input. From the power supply logo, The charging head has passed the European CE certification, but no relevant mark of 3C certification has been seen.

As the standard configuration of the power bank series products, Douneng is also equipped with a MicroUSB charging line, which is slightly shorter for me, who is used to long lines. However, the short charging line also has certain advantages, that is, it can effectively prevent the confusion and entanglement of the line when used. The Douneng charging switch power supply itself has a certain length of extension line, which should be designed to make up for the short charging line, fully reflecting the delicacy of the manufacturer's designers.

Douneng smart charging treasure family photo, charging treasure, charger and charging cable, black and white matching.

Douneng Power Bank documents. Douneng Power Bank has a quick operation manual, which is in the same format as the standard manual. It also has complete troubleshooting, use precautions, product guarantee and after-sales service. However, one thing to note here is that the designer of this instruction manual is lazy. Since the color instruction manual has been made, the image processing should be more careful, not only the image processing at the location of the power bank is slightly rough. This has affected the overall image of Douneng.

In the manual, the functions of various components of the charging board, APP download and simple instructions for use are described in detail, and the anti loss function and Bluetooth self timer function of Douneng Power Bank are specially introduced.

Disassembly

As for the appearance of the power pack, the author feels that it is quite perfect, so it is necessary to have a certain understanding of the internal structure and design of the power pack. Therefore, the author takes apart the Douneng Smart Power Pack and observes its internal structure. The design of Douneng's shell is quite rigorous, and the fit of the shell is also quite high. Before understanding Douneng's structure, the author once thought it was a heat sealed product. We know that once a heat sealed product is disassembled, it will be violently disassembled, which will cause considerable damage to the device. However, considering that this is a power bank product and a power bank with Bluetooth function, its design should not be a one-time heat seal. After carefully observing the shell of Douneng, the author decided to try, By observing the design of the USB interface of Douneng Power Bank, the author determined the direction of the shell, so without using any tools, he slowly cut along the side seal with the nail of his thumb about 2mm long. After he found the snap position smoothly, he slowly disassembled it. He kindly reminded us that there is a risk in disassembling the machine. If you are not sure, please do not disassemble it yourself to avoid damage to the machine. After removing one side, you can clearly see the snaps of the Douneng Power Bank. There are three snaps on each side on the two sides, and one snap on each side on the top and bottom, which means that the number of snaps of the Douneng Power Bank is 10.

Open the shell part, you can clearly see the internal structure, the main body is the battery, and above the battery is the circuit part of Douneng Smart Charging Bank. The small black spot connected by two red lines on the way is the temperature sensor of Douneng Smart Power Bank, which is used to detect the battery temperature of the power bank. However, in the current design mode, the temperature sensor is not completely fixed, which may affect the temperature sampling of Douneng to some extent.

Observing the battery model and capacity, it can be clearly seen that Douneng Smart Power uses a soft package polymer battery with a nominal capacity of 5500mAh, but the external packaging and official publicity of Douneng Power Bank are 5000mAh, It is estimated that this is why Douneng Technology dares to propose "Douneng's exclusive after-sales guarantee service system, which provides after-sales maintenance services for up to a year. At the same time, the app displays products with less than 300 cycles and less than 4000mAh of fully charged battery, Douneng will provide free replacement services; the official anti-counterfeit verification system automatically identifies the authenticity of products, giving you the most intimate use guarantee." The confidence of this after-sales service, at least at present, no other manufacturer dares to propose such a free replacement service. However, due to the relevant hardware circuit and underlying software design of Douneng, Douneng Smart Charger can conveniently write encrypted digital IDs for its own products, which can automatically identify the authenticity of products and avoid the loss of Douneng Technology because consumers buy cheap counterfeit products and join the replacement team.

As shown in the figure, Douneng attaches great importance to the heat dissipation design of the circuit, which enables the author to understand why Douneng Smart Charger can realize 3A high current charging and 1.5A high current discharging. The front of PCB is equipped with MSP430 processor, BQ27541 battery management chip and 8205A as the protection circuit.

Dismantle the PCB and you can see the back circuit of the Douneng Smart Power Bank. The Bluetooth communication module is the core board of the separately designed Bluetooth communication module. This design should be based on the high yield or the outsourcing of the Bluetooth communication core board. The charge management chip of the whole circuit is BQ24295, and the design of the protection circuit is based on the protection chip DW01A of lithium battery and the common drain N-channel enhanced power field-effect transistor 8205A. The key switch, USB output interface, USB3.0 input interface and the circuit of the buzzer are all located on this side. At the same time, the LED indicator light is also located on this side of the PCB. It is a red LED and a blue LED packaged by the chip 0805. Through the light path design of the housing light guide column, it can easily indicate the charging and other states of the charging bank.

Let's take a summary look at the main components of Douneng Smart Charger. Douneng adopts the BQ27541 battery management chip of Texas Instruments, TI Company. The remaining capacity, charging state, battery voltage and other parameters of the battery in Douneng APP are obtained through this chip. And use TI's BQ24295 to realize the charging of Douneng intelligent charging bank. The Bluetooth communication chip is also the CC2540 low-power Bluetooth chip of TI Company. DW01 and 8205A are used to realize various protection functions of the power bank. From the perspective of these chips, the hardware cost of Douneng Smart Power Bank is relatively high.

APP Experience

The app of Douneng Smart Power Bank is divided into IOS version and Android version. After experience, the basic functions of the two versions of the app are the same, so the author uses the Android version of the app to experience. When Douneng Smart Charger enters the application, the first prompt is to enter the battery capacity of the mobile phone currently in use. For example, the battery capacity of the mobile phone of the author is 1800mAh. Enter it and click OK to enter the next step.

When you enter an application, like most applications, the system will automatically give instructions on how to use it when you first enter the application. You can see the description of the connection mode and self timer function of Douneng Power Bank.

Introduction to the anti loss function: when Bluetooth is turned on, entering the APP will automatically search for Douneng Power Bank, and the APP will display "Connecting". It must be mentioned that if Bluetooth is not turned on before entering the APP, the APP will first prompt to turn on Bluetooth, but there is a bug in the APP at present. If Bluetooth is not turned on, the APP will flash back. After the connection is successful, the APP will display the number of times that the charging bank can charge the machine. The rated capacity is 5000mAh, which will not change at present, while the current power is the current proportion displayed. Personally, the proportion and current capacity displayed here are better. Battery health and cycle times show the current battery health. Click the battery icon below to see the status information of the battery. At present, the battery is idle, and the current capacity and rated capacity are displayed here. Product number, name and delivery date, number of use cycles, alarm power alarm value and battery type.

Click the refresh button on the top to enter the page of selecting Douneng Smart Power Bank, where you can search all Bluetooth devices. Choose your own power bank. Click Settings to make detailed settings for Beans. For example, whether to turn on the anti loss function and whether to turn on the anti loss sound, it should be reminded that if you choose to turn on the anti loss sound, the phone will sound a loud ring when the anti loss button is pressed even in the vibration state. This setting can effectively implement the anti loss function, but if you are in a meeting, you need to be careful about the setting of this function.

Low power alarm and call bean can be set. The minimum power alarm function can be set according to your own needs. Call bean can be set as many times as you need. It can be set slightly less when you are at home, and can be set more times when you are away on business. If the initial setting is incorrect, you can change the name of Douneng here. However, at present, only letters and numbers are supported, not Chinese.

The mobile phone is charged by the power bank. The current power can charge the phone for 1.8 times. After charging, the status changes to discharging, and the charging current for the mobile phone is displayed. Due to the limitation of mobile phone charging, the current charging current for the mobile phone is 0.39A. Under the current discharge current, the battery will continue to discharge for about 16 hours.

In the charging state, the charging current of my own data cable is 1.13A, and the expected charging time is 4 hours and 9 minutes. The time calculation is very accurate. When charging is idle, click the camera icon of the power bank APP to open the Bluetooth self timer function, and you can see that the Douneng smart power bank is currently charging, The LED indicator is red, the charging position is red, and the full charge is blue. Under the selfie function, press the button of Douneng to take a picture. However, this function is relatively simple, and there is much room for improvement later.

During the charging process, it can be seen that when the battery is basically full, the current will drop to a certain extent, that is, the charging state of Douneng Power Bank itself will change with the voltage. The ideal charging state is the gradient charging mode. The mobile phone can be charged twice when it is fully charged. The capacity of this phone is 1800mAh, the capacity of the two times is 3600mAh, and the actual capacity is 5690mAh. After calculation, the discharge efficiency is about 64%. The 0.64 discharge efficiency should not be wrong, including the loss of the power bank itself. After being fully charged, we can see that the actual capacity of Douneng Smart Power Bank is 5690mAh, which is much higher than the nominal capacity of 5000mAh. It is quite consistent with the 5500mAh capacity we saw when we disassembled the machine. From this point of view, Douneng Smart Power Bank is a genuine product with conscience quality. The capacity of 93% before charging is 5288mAh, while that of full charge is 5690mAh, 5288/5690=93%, indicating that the measurement of charging chip is quite accurate. The content of status information and basic information shows the status of Douneng Power Bank. Douneng APP introduces the relevant information of Douneng Technology, and provides the function of feedback, which can directly feedback relevant information through email.

Douneng smart charging bank can also recognize the charging related knowledge through Douneng's small knowledge when using Douneng for charging everyday.

Summary

Douneng smart charging bank has the functions of 3A high current charging and 1.5A discharge, which can realize the fast charging function of the charging bank. For modern people who are busy with work, fast and efficient charging is obviously more suitable for everyone's use. The 1.5A high current discharge of the charging bank can realize the charging function of mobile phones and tablets. Anti loss function, you can easily find your mobile phone and power bank. Bluetooth self timer function, you can use beans to easily achieve the self timer function of mobile phones. However, Douneng also has some problems, mainly as follows:

1. When the Bluetooth is not opened in advance, the Douneng APP app prompts that there is a flash back problem when the Bluetooth is opened;

2. During the charging process, Dou can have a BUG that stops charging accidentally. You need to press the button to continue charging;

3. The capacity of Douneng Power Bank is only 5000mAh, even if the surplus capacity is included, it can only reach about 5600mAh. For the current increasing number of digital device batteries, it is really a little less. I hope that Douneng's later products can consider increasing capacity or replacing the built-in batteries;

4. The photo function in the application of Douneng APP is slightly rough at present, and the expectation for this function is still high. We hope that Douneng Technology can focus on improving this function in the future;

5. The temperature sensor in the hardware of Douneng Power Bank is not firmly fixed at present, which may affect the temperature sampling function to some extent. According to Douneng Technology, the circuit adjustment of this part has been modified at present;

6. During the charging process of Douneng, if you answer the phone, Douneng will give an alarm, which sometimes affects the experience. I hope it can be improved later.

On the whole, Douneng Smart Charger is a rare genuine and conscientious product. From the perspective of Douneng Technology, we have more reasons to expect every product of Douneng Technology.