Millet mobile power supply measured quality out of _ millet mobile power can charge iphone?
Xiaomi launched the Xiaomi mobile power supply 2 in the middle of last month. From the specification, this new product is relatively close to the Xiaomi mobile power supply version. It also has 10000mAh power and supports QC 2.0 two-way fast charge, although USB type-c is not configured. The interface still maintains the aluminum metal casing design, and all this is only the price of 79 yuan, which makes the millet mobile power 2 from the moment of release has received a lot of players' attention.
At present, the Xiaomi mobile power supply 2 has two versions of silver and black, but the two specifications are identical except for the difference in color. Millet mobile power supply 2 is made of aluminum metal casing. It is made by CNC edge technology. The surface is anodized. The size is 130*71*14.1mm and the weight is 223g. The size and weight are moderate and easy to carry.
Millet mobile power 2
The millet mobile power supply 2 is equipped with a lithium polymer battery with a power of 10000mAh and a constant voltage of 3.85V. The input and output support QC 2.0 fast charging technology. The output supports 5V 2A or 9V/12V 18W specifications, and the rated output specification is 5V. 2.4A or 9V/12V 15W.
It is worth mentioning that Xiaomi Mobile Power 2 supports a small current output mode, which can be turned on by double-clicking the independent switch. This function is mainly used to charge devices such as Bluetooth headsets or smart bracelets. Since the charging current of such devices is only a few tens of milliamps, the ordinary mobile power supply is likely to determine that the device is fully charged and cut off the output. The Xiaomi mobile power supply will maintain the output within 2 hours after the low current output mode is enabled. Even if the output current is as low as several milliamps, it will not automatically turn off, thus realizing the function of charging Bluetooth headsets, smart bracelets and other devices.
The input interface of Xiaomi Mobile Power 2 is a common Micro USB interface, and the output interface is a standard USB interface. There are 4 white LED lights on the side for power display and independent switches.
Millet mobile power 2 has a good design
Millet mobile power 2 packaging
Millet mobile power 2 dismantling
The structure of Xiaomi mobile power supply 2 is basically the same as that of the other millet mobile power supply with metal casing design. It is relatively easy to disassemble and recover. When disassembling, we only need to remove the top and bottom panels, then remove the screws. With a fixed bottom bezel, the internal structure of the mobile power supply can be easily pushed out, and these steps can be reversed during recovery.
Millet mobile power 2 internal structure (front)
Different from the purple rice QB805 two-way fast charging mobile power we have reviewed before, Xiaomi mobile power supply 2 is not a common TI BQ25895 TI S61088 FP6601 solution, but a ZMI P02Q6RB ZMF 1206USBN solution with purple rice customization. Zimi QB810 two-way fast charging mobile power supply, but Xiaomi did not disclose the specific specifications of the chip, we guess its performance should not be lower than the common Texas Instruments TI BQ25895 TI S61088 FP6601 program.
Millet mobile power 2 internal structure (reverse)
In terms of batteries, Xiaomi mobile power supply 2 is powered by 10000mAh/38.5Wh battery, charging voltage is 4.4V, output equalization is 3.85V, and a thermistor with negative temperature coefficient is installed on the side of the battery. Overheating protection.
Mobile power main PCB
Xiaomi mobile power supply 2 uses the power management chip is ZMI P02Q6RB customized by Zi Mi. This chip is also used in the purple rice QB810 two-way fast charging mobile power supply. It is said to be specially developed for Lishen battery, which can be fully utilized. The effectiveness of the battery.
Below the USB output of the mobile power supply is a 8205B chip, mainly used for output protection.
Millet mobile power 2 is equipped with 4 white LEDs as power indicator
Millet mobile power supply 2 is equipped with NTC and R100 current-sense resistors for overheat protection
The MCU used by Xiaomi Mobile Power Supply 2 is a ZMF 1206USBN single-chip microcomputer. It is judged from the model that it is also a custom chip of Zi Mi, but the specific specifications are not clear yet.
Millet mobile power 2 maximum output current and maximum output power test
Xiaomi mobile power supply 2 supports QC 2.0 fast charge output, rated output specifications are 5V 2.4A or 9V/12V 15W. In the maximum output current and maximum output power test, we selected the 5V, 9V, 12V three-speed output voltage, and tested it by 0.1A step.
In the 5V output mode, the starting voltage of the millet power supply 2 is 5.24V, the end voltage is 5.05V, the maximum output current is 2.6A, and the maximum output power is 13.1W.
In the 9V output mode, the starting voltage of Xiaomi mobile power supply 2 is 8.97V, the ending voltage is 6.71V, and the maximum output current is 2.2A. However, since the mobile power supply has entered the output protection state, the output power is only 14.8W. The point with the highest output power is 8.81V 2.1A, which is equivalent to 18.5W power.
In the 12V output mode, the starting voltage of Xiaomi mobile power supply 2 is 11.89V, the ending voltage is 9.94V, and the maximum output current is 1.8A. However, the mobile power supply is in output protection state, and the output power is only 17.9W. The highest power point is 11.84V 1.7A, which is equivalent to 20.1W power.
It can be seen from the above test results that the maximum output current of Xiaomi Mobile Power Supply 2 is 2.6A, and the maximum output power is about 20W. After this power is exceeded, the mobile power supply will enter the protection state.
Millet mobile power 2 discharge test
We conduct discharge test on Xiaomi mobile power supply 2 with 5V/2A, 9V/1.5A, 12V/1.2A four output specifications to calculate the discharge energy and discharge efficiency of mobile power supply under different output specifications. The specific test results are as follows:
5V/2A test: discharge equalization is 5.06V, discharge energy is 34.47Wh, and discharge efficiency is 89.53%;
9V/1.2A test: discharge equalization is 8.67V, release energy is 34.06Wh, and discharge efficiency is 88.47%;
12V/1A test: discharge equalization is 11.39V, discharge energy is 33.64Wh, and discharge efficiency is 87.20%;
According to our actual measurement, Xiaomi Mobile Power 2 can provide 5V/1.8A charging specifications for iPhone 7. According to its actual discharge energy, this mobile power can charge iPhone 7 4.8 times and iPhone 7 Plus 3.2 times.
In addition, Xiaomi Mobile Power 2 only supports QC 2.0 fast charge output. For devices using MediaTek PE fast charge, it can only be charged at 5V. In addition, in the state of QC 2.0 fast charge output, Xiaomi mobile power supply 2 will have obvious voltage drop problem in the last 30 minutes of discharge, but the output current can still be stable, and there is no such problem under the 5V conventional output.
5V discharge test, the discharge voltage equalization is 5.06V, the discharge energy is 34.47Wh, and the discharge efficiency is 89.53%.
9V discharge test, the discharge equalization is 8.67V, the emission energy is 34.06Wh, and the discharge efficiency is 88.47%.
12V discharge test: discharge equalization is 11.39V, release energy is 33.64Wh, discharge efficiency is 87.20%
Millet mobile power 2 output ripple test
The output ripple Vp-p value is tested at 5V/1A and 5V/2A output. The oscilloscope 20MHz bandwidth limit is turned on and the test interface is connected to the decoupling capacitor. According to the YDT 1591-2009 standard according to the national communications industry, the Vp-p of the output ripple for a 5V output adapter should be ≤200mV at 0 to the rated output current.
5V/1A output low frequency ripple 26mV, high frequency ripple 20mV
5V/2A output low frequency ripple 38mV, high frequency ripple 26mV
Millet mobile power 2 charging test
Xiaomi Mobile Power 2 supports the QC 2.0 protocol and can be charged with input 5V 2A or 9V/12V 18W. Since it does not have a standard charger, we used two different charging heads in the charging test, namely the purple meter AP511 (5V/2A) and the Meizu UP0830 (5V/3A, 8V/3A, 12V/2A). Among them, Meizu UP0830 can support QC 2.0 protocol.
Charging with the purple rice AP511 (5V/2A) charging head, the charging voltage can reach 5.26V, the charging time is close to 6 hours, the charging current can exceed 2.0A, but the current is unstable during charging, there is obvious fluctuation, charging is completed After that, there will still be a current input of about 30 mA.
Charging with Meizu UP0830 (5V/3A, 8V/3A, 12V/2A), the charging voltage is 9.04V, the charging time is about 3 hours and 55 minutes, the time is obviously shortened compared with the conventional 5V charging, and the charging current can exceed 2.0A, but there is a significant fluctuation in current during charging, and there will still be a current input of about 30mA after completion.
Comments and purchase suggestions: two-way fast charge, ripple performance is good, 79 yuan is worth buying
From the appearance and workmanship, Xiaomi mobile power supply 2 is quite good, the edge of the metal casing has a good grinding process, the size and weight are moderate, and it has good portability. It is also equipped with independent switch and power indicator. It is also convenient.
In terms of performance, Xiaomi Mobile Power 2 supports QC 2.0 input and output, the protection function is relatively complete, the discharge current is sufficient and stable, the conversion efficiency exceeds 85%, and the output ripple is also up to standard and performs well. However, this mobile power supply has a large fluctuation in current when charging input, and since it only supports the QC 2.0 protocol, it does not make much sense for devices that use PE fast charging.
At present, there are two most direct competitors of Xiaomi Mobile Power 2. One of them is the high-grade version of Xiaomi mobile power with Texas Instruments. It is equipped with USB type-c interface, and the rated output power is higher at 18W, but its price is also To be higher is 149 yuan. In contrast, the rated output power of Xiaomi Mobile Power 2 is 15W lower than the former, and there is no USB type-c interface, but it does not have a significant impact on daily use. It can be said that the price is 79 yuan. Full of sincerity.
Compared with the purple rice QB810 two-way fast charging mobile power supply, Xiaomi mobile power supply 2 adopts the same scheme as the other party. The two can be said to be the brothers of the same mother. The main difference is that the purple rice QB810 is made of plastic shell and configured. There is USB type-c input interface and fast charge indicator light, the price is 99 yuan, and Xiaomi mobile uses a metal shell, the appearance of the texture is better, but the USB Type-C interface and fast charge indicator light are streamlined, the price is also 20 yuan cheaper Both can be said to have their own advantages, and the cost performance is relatively high.
Therefore, in terms of various factors, for most users who use the iPhone or support QC 2.0 fast charging devices, Xiaomi Mobile Power 2 will be a product worth buying.
Can Xiaomi mobile power supply charge iPhone?Millet mobile power supply configuration output voltage DC 5.1V output current 2100mA. The power is around 10W.
The iPhone is universally recharged by the iPad's adapter (the iPad comes with a USB power adapter. You can also use this adapter with your iPhone and iPod). You can see that the iPhone supports 12W input power, as shown in the figure.
In addition, Xiaomi official website also gives instructions to support the iPhone. The original words: "Millet mobile power (10400mAh) has joined TI's special intelligent USB charging controller, which is compatible with most products on the market, especially for the more popular brands. Models, such as Xiaomi, Apple, HTC, Motorola, Nokia, Huawei and other brands of smartphone products, can basically achieve full compatibility, can bring very good charging effect."
Saintish 12V deep cycle lithium batteries are with similar dimension as lead acid batteries, but it is only 1/3 of the weight of lead acid, and delivers twice power, the max.continuous discharge current up to 100A.
The built-in battery management system can monitor each prismatic cells status during battery working. It protects the lithium battery from over charge/discharge, over temperature and short circuit.
Our deep cycle lifepo4 batteries accept maximum of 4pcs in series connection or 4pcs in parallel connection in order to increase the overall capacity.
The bluetooth function is optional for saintish lithium batteries. But for these without app monitoring batteries, the quality is for sure not reduced. It is just at another level price at same quality.
Deep Cycle 12.8V Lithium Battery, Rechargeable LifePO4 Battery, 12V Lithium Battery System
Hangzhou Saintish Technology Co.,Ltd. , https://www.saintishtech.com