Preface
eero is a manufacturer focusing on home WiFi routers, which was founded in 2014 and acquired by Amazon in 2019. Charging head network has disassembled one of its 24W PD fast charging chargers. Recently, the charging head network got a 140W power adapter from eero, which supports PD 3.1 140W fast charging, and then we will enter the test together to see how strong this adapter is.
Product Introduction
This eero 140W power adapter has a flat and slender appearance, with an integrated Type-C cable on the right side, and the adapter is made of a fireproof PC case with matte finish, and the "eero" brand logo is embossed on the front.
The output on the right side is designed at the integrated Type-C cable, which cannot be split and is more stable, and the extended network tail is more resistant to bending.
Non-slip silicone pads are added to the four corners of the back, and there are subtle openings to accelerate heat dissipation.
There is an inscription sticker on the back and in the middle.
Serial: C410011;
输入:100-240V~ 2.5A 50/60Hz;
输出:5V3A,9V3A,15V3A,20V5A,28V5A.
The power input interface of the adapter is still the national standard 3-hole plum blossom port, and the internal metal pins are made of all-copper nickel-plated material, which is more conductive and wear-resistant and scratch-resistant.
The AC cable plug at the input end adopts the national standard three-pin plug, and is printed with the words 10A 250V~ and CCC certification mark.
The Type-C terminal is designed with a special PIN pin inside the terminal.
The length of the one-piece cable is about 99cm.
The length of the eero 140W power adapter body is about 141.96mm.
The main body width of the eero 140W power adapter is about 70.12mm.
The height (thickness) of the eero 140W power adapter body is about 32.18mm.
The overall weight of the eero 140W power adapter is about 422.7g.
The charger body is placed in the palm of an adult man's hand, and it looks similar to a flat power bank.
Protocol testing
In addition to the marked fast charging protocol, understanding the complete protocol can facilitate users to choose equipment according to the specific protocol and achieve a better fast charging experience.
Using the POWER-Z KM003C tester, it was measured that the Type-C port supports DCP, PD3.1 and other charging protocols.
In terms of PDO messages, it has four sets of fixed voltage ranges: 5V3A, 9V3A, 15V3A, 20V5A, and 15-28V 140A AVS supplementary voltage range, which lacks 12V voltage range compared with the conventional 140W adapter.
Product reviews
Next, I will take you to take a look at the specific experience of using this eero 140W power adapter, and the charging head network will take you to understand this notebook adapter in an all-round way from the aspects of compatibility test, charging whole process test, standby power consumption test, etc.
Charging compatibility test
The compatibility test link can clearly know the charging situation of the charger for each device, and dozens of different models will be tested this time. Let's take a look at the specific fast charging support of the USB interface.
Connect the power bank that supports Type-C PD 3.1 140W fast charging to the eero 140W power adapter, and use the POWER-Z KM003C tester to read that the input power of the power bank end is 28.04V 4.83A 135.52W, confirming that it supports PD 3.1 fast charging.
Connect your MacBook Pro to the eero 140W power adapter and use the POWER-Z KM003C tester to read the input power of the laptop end to 20.02V 4.65A 93.07W.
Summarizing the charging data of the device into a table, it can be seen that the handshake voltage of 5V and 9V for mobile phones of various brands is not much different, the handshake for high-power fast charging devices such as handhelds, tablets and laptops can shake hands at 15V and 20V, and for devices that can support PD 3.1 fast charging, the handshake voltage can be 28V.
Drawing a histogram, it can be seen that the eero 140W power adapter is more suitable for high-power products such as laptops and handhelds, with a measured maximum of 135.52W; occasionally it can also charge mobile phones in an emergency, but the charging power is stable in the range of 10-18W, and a small number can reach about 25W; in general, the eero 140W power adapter has good compatibility with laptops, focusing on fast charging of high-power devices such as laptops.
Charging is tested throughout the process
The eero 140W power adapter supports the maximum power PD 140W charging, in terms of test equipment, the charging head network selected the MacBook Pro M1 Max as the test object, and placed the eero 140W power adapter and MacBook Pro M1 Max in a 25°C incubator, and turned on the power supply, the test results are as follows.
After turning on the power supply, the handshake 20V voltage, the power is stable at about 93W for the first 40 minutes, then the power drops to about 65W and continues to charge for 53 minutes, then the power drops to about 42W and continues to charge for 1 hour 09 minutes, and then the power decreases in a "curve" and continues until the end of charging, and the charging process takes about 2 hours and 08 minutes.
Drawing a line graph, you can see that the eero 140W power adapter takes 33 minutes to charge the MacBook Pro M1 Max to 50%, 58 minutes to 80%, and 2 hours and 08 minutes to charge to 100%.
Here's a look at how the eero 140W power adapter performs when charging the iPhone 15 Plus.
After the power is turned on, the handshake 9V voltage, the power is stable at about 26W in the first 17 minutes, then the power drops to about 21W and continues to charge to 30 minutes, then the power drops to about 15W and continues to charge to 41 minutes, the voltage drops from 9V to 5V in the 50th minute, then the power drops to about 8W and continues to charge until 1 hour 04 minutes, and lasts until the end of charging, the whole charging process takes about 1 hour and 59 minutes.
Drawing a line chart, you can see that the eero 140W power adapter takes 25 minutes to charge the iPhone 15 Plus to 50%, 53 minutes to charge to 80%, and 1 hour and 59 minutes to charge to 100%.
No-load power consumption test
Whether the charger will waste electricity when it is not in use when it is plugged into the socket, and how much power will be lost, is a question in the minds of many readers, and the standby power consumption link is to answer this question. Plug the charger into the socket of the Betsy power meter, turn off the screen and lights, and read the data on the power meter, the test results are as follows.
After the power meter test, the no-load power consumption of the charger at 220V 50Hz voltage is 0.09W, which is converted to a year of about 0.79KW·h, if the market price is 0.6 yuan/KW·h, the annual electricity cost of the charger is about 0.47 yuan.
Let's take a look at the no-load power consumption at 110V 60Hz voltage, the power consumption read by the power meter is 0.04W, which is converted into a year of about 0.525KW·h, if the market price is 0.6 yuan/KW·h, the annual electricity cost of the charger is about 0.21 yuan.
brief summary
After the above no-load power consumption test, the eero 140W power adapter is not used when plugged into the socket in the 220V 50Hz voltage environment, and the electricity cost is about 0.47 yuan in a year, while the electricity cost is about 0.21 yuan in a year when plugged into the socket in the 110V 60Hz voltage environment.
Conversion efficiency test
The charger is essentially a conversion device, there will be losses in the process, and the heat is dissipated, the charger will often draw more power from the socket than the charger labels, and the eero 140W power adapter is tested for conversion efficiency at 220V 50Hz and 110V 60Hz AC input, and the test results are shown in the figure below.
Let's take a look at the conversion efficiency under 220V 50Hz voltage, the overall conversion efficiency is between 86.16-91.32%, of which the highest conversion efficiency is 28V5A, the conversion efficiency reaches 91.32%, and the lowest conversion efficiency is 5V3A, which is 86.16%.
Looking at the conversion efficiency under 110V 60Hz voltage, the overall conversion efficiency is between 87.87-91.22%, of which the highest conversion efficiency is 28V5A, with a conversion efficiency of 91.22%, and the lowest conversion efficiency is 5V3A, with a conversion efficiency of 87.87%.
Overall, the eero 140W power adapter performs best among similar chargers in terms of conversion efficiency at both types of voltages.
Ripple test
Due to the switching power supply used in the charger, the secondary output of the transformer is not direct current, and the output needs to be rectified and capacitive filtering, that is, there will be ripple in the output of the charger; the charging head network uses an oscilloscope to test the ripple value of the charger output, and compares it with the industry standard to detect the output quality of the charger. The lower the ripple, the higher the output quality of the charger.
No-load ripple
First of all, look at the no-load ripple at 220V 50Hz, the highest ripple peak is 5V0A with a ripple peak of 78mVp-p, and the lowest ripple peak is 20V0A with a ripple peak of 44mVp-p.
Let's take a look at the no-load ripple performance at 110V 60Hz, the highest ripple peak is 12V0A with a ripple peak of 68mVp-p, and the lowest ripple peak is 28V0A with a ripple peak of 42mVp-p.
On-board ripple
First of all, look at the on-load ripple at 220V 50Hz, the highest ripple peak is 5V3A, and the ripple peak-to-peak is 74mVp-p, and the lowest ripple peak-to-peak is 15V5A, and the ripple peak-to-peak is 52mVp-p.
Let's take a look at the on-load ripple performance at 110V 60Hz, the highest ripple peak is 28V5A with a ripple peak of 70mVp-p, and the lowest ripple peak is 15V3A with a ripple peak of 46mVp-p.
brief summary
YD/T 1591-2009 communication industry standard charger ripple requirements are not higher than 200mVp-p, eero 140W power adapter at 220V 50Hz, 110V 60Hz input voltage, the output power ripple peak value is up to 78mVp-p, in line with the industry standard ripple is not higher than 200mVp-p requirements.
Temperature test
The charger is a conversion device, and there will be loss during the charging process, which will be dissipated in the form of heat, so the charger will heat up. The eero 140W power adapter supports up to 28V 5A 140W output, place the charger in a 25°C incubator, and collect the temperature on the surface of the charger after one hour of 28V5A load.
First, let's see how the charger temperature behaves at 220V 50Hz voltage output.
After an hour, the surface temperature of the charger photographed with a thermal imager was 39.6°C.
On the other side, the surface temperature of the charger photographed with a thermal imager was 37.2°C.
Let's take a look at the temperature at 110V at 60Hz.
After an hour, the maximum temperature of the surface of the charger captured with a thermal imager was 55.5°C.
On the other side, the surface temperature of the charger photographed using a thermal imager was 57.3 ° C.
The temperature data is summarized into a table, with a maximum temperature of 39.6°C at 220V 50Hz and a maximum temperature of 57.3°C at 110V 60Hz.
Plotting the data into a histogram, it can be seen that the maximum temperature of the output of the eero 140W power adapter at 220V 50Hz and 110V 60Hz voltage is 57.3°C, and the maximum temperature during the load test meets the requirements of the IEC International Electrotechnical Commission IEC62368 and the new national standard GB4943.1 2022 for electronic and electrical equipment testing, and the temperature is not higher than 77°C.
Summary of the charging head network
The eero 140W power adapter adopts the classic design of the power output and input of the old notebook in appearance, and adopts the plum blossom interface made of nickel-plated copper, and the charging cable of the national standard three-pin AC cable and integrated Type-C port can be compatible with most smart devices and wall plugs on the market.
In terms of performance, the Type-C interface supports PD3.1 140W fast charging, which can be measured to provide good fast charging support for tablets and laptop devices, and has a standby power consumption of less than 0.09W and a conversion efficiency of 86.16-91.32% under the two types of mains power of 110V 60Hz and 220V 50Hz, with excellent performance.
Under the heavy load of 220V 50Hz AC input, the ripple difference of low-grade output is relatively average, and the ripple value is lower than 78mVp-p, and the measured results show that the output of this charger is stable, and the output temperature is about 57.3°C for one hour at 25°C with PD 28V5A 140W power room temperature, which is excellent.
Overall, the eero 140W power adapter adopts an integrated Type-C fast charging cable design, which is the mainstream level of similar products in terms of conversion efficiency, power output quality, and temperature control.