In terms of protocols, ChargerLAB's POWER-Z KT002 is used to read the fast charging protocol of the charger. It is actually tested to support charging protocols such as Apple2.4A, QC2.0, QC3.0, QC4+, PD3.0 and PPS.

Preface

Lenovo As a member of USB-IF, it has been sparing no effort in promoting the PD fast charging protocol, especially the lipstick charger series in the past two years. Its compact size and exquisite shape have detonated the third-party charger market as soon as it was released. Charging Head Network has also previously reviewed and disassembled several power adapters from Lenovo. The charger brought by

this time is close to the lipstick charger in form, with 65W power + single USB-C output interface. It looks quite nostalgic now in 2022, and it is indeed a product from two years ago. Take a look below Can the old PD charger still hold up?

product introduction

Old products naturally have no packaging, so the unboxing part is omitted here.

Lenovo’s 65W charger has a conventional long strip shape and is a killer wall plug.

The charger has the Lenovo logo and the words 65W on the side.

The top of the charger is the USB-C output interface, which looks a bit nostalgic now, but considering that it was designed by Lenovo to support its own equipment, there is nothing wrong with it. The plug of the

charger uses fixed pins. The model is ADLX65UAGC2D. It supports wide-band voltage input and has a maximum output of 65W. The manufacturer is Kangshu Technology Co., Ltd. The length of

charger is about 60.24mm. The width of the

charger is about 32.97mm. The height of the

charger is about 32.09mm, the size of the charger is about 60.24×32.97×32.09mm, and the volume is about 63.73cm³. Calculated based on the output power of 65W, the power density is about 1.01W/cm³. This performance is still up to now. Considered a leader. Comparing

with Apple’s 67W charger, the size difference goes without saying. The side width of

charger is compared with that of a one-yuan coin. The single weight of the

charger is about 96.8g.

is held in the hand, and the performance of this size is outstanding.

protocol test

This test module mainly tests the fast charging protocol of the charger. Users can match the output device according to the specific protocol to obtain a better fast charging experience. In terms of

protocol, ChargerLAB's POWER-Z KT002 is used to read the charger's fast charging protocol. The actual test supports Apple2.4A, QC2.0, QC3.0, QC4+, PD3.0 and PPS charging protocols. In terms of

PDO messages, it supports five sets of fixed voltages 5V3A, 9V3A, 12V3A, 15V3A and 20V3.25A and a set of PPS voltage levels of 5-20V3.25A, which has better device compatibility.

product review

Next, I will show you the specific experience of using this charger. Charging Head Network will give you a comprehensive understanding of this charger from aspects such as compatibility testing, full charging testing, and standby power consumption testing.

charging compatibility test

compatibility test session can clearly know the charging status of each device by the charger. Charging Head Network will use dozens of devices with chargers for testing, presenting real test data to readers.

Nubia Z30 Pro is the flagship mobile phone released by Nubia on May 20, 2021. It supports 120W fast charging in terms of charging. Use Lenovo 65W charger to charge Nubia Z30 Pro, the power is 17.07V 3.33A 56.94W.

charges the Red Magic 7 Pro with a power of 16.85V 3.33A 56.22W.

charges iPhone 13 Pro Max with a power of 9.35V 2.93A 27.45W. Lenovo’s 65W charger can fully meet the fast charging needs of iPhone 13 Pro Max.

charges iPad Pro, triggering 15V high-voltage fast charging with a power of 31.18W.

charges Lenovo Xiaoxin Air. The charger outputs 20V high voltage and the power is about 54W.

Switch base TV mode supports PD fast charging, but if you want to activate the base TV mode, you need a PD charger to support PD fast charging levels of 15V3A and above, that is, the charger must support at least 45W fast charging.Use Lenovo 65W charger to power the Switch base TV mode. The charger output power is 15.03V 0.3A 4.62W, and the base TV mode is successfully lit.

summarizes the compatibility test data for everyone to view.

Histogram Here you can clearly see the charging power of each device.

Full charging test

Lenovo’s 65W charger can already meet the charging needs of notebooks. For the 65W power range, this time I chose to do a full charging test for MacBook Pro 13. The following is the actual measured data.

This is the data change during the entire charging process of MacBook Pro 13 using Lenovo 65W charger. The whole process is roughly divided into 5 stages. Each stage has instantaneous current fluctuations of varying degrees. Finally, charging ends in 2 hours and 19 minutes, with the highest The power is 19.62V 2.92A 57.35W.

plots the charging data into a curve chart. From the curve chart, we can know that the Lenovo 65W charger charges the MacBook Pro 13 35% in half an hour and 67% in 1 hour. It takes approximately 2 hours and 18 minutes to fully charge.

Standby power consumption test

Nowadays, it has become normal for users to not unplug the device from the socket after using the charger to charge the device. Many readers want to know whether the charger wastes electricity if it is always plugged into the socket. The standby power consumption test session is to answer this question.

has been tested by power meter . The no-load power consumption of the charger at 220V 50Hz is 0.065W. The converted power loss in one year is about 0.56KW·h. If the market price of electricity is 0.6 yuan/KW·h, the charger The annual electricity bill is about 0.336 yuan. The no-load power consumption of

10V at 60Hz is 0.013W. After conversion, the electric energy lost in one year is about 0.11KW·h. If the market price is 0.6 yuan/KW·h, the annual electricity bill of the charger is about 0.066 yuan.

Conversion efficiency test

The charger is essentially a conversion device, and there will be losses in the process, which are emitted in the form of heat. We usually look at the parameters on the charger. The output of 100W or 65W is the maximum output power that the charger can provide for the device, but the power the charger draws from the socket is often larger. The following is the charger's AC 220V 50Hz and 110V 60Hz Conversion efficiency tests were conducted separately under the input conditions, and the test results are as follows. The

histogram summarizes the conversion efficiency of the charger at different output levels under two input voltages. Under 220V 50Hz, test the charger at full output power at each voltage range: the input power at the AC terminal and the output power at the USB terminal of the power strip are measured at the four ranges. Through calculation, the conversion efficiency of the charger can be obtained from It ranges from 88.08% to 93.05%.

10V 60Hz, the charger's conversion efficiency ranges from 89.87% to 92.25%.

Ripple test

Since the charger uses switching power supply , the secondary output of the transformer is not direct current . It needs to be output through rectification and capacitor filtering, that is, there will be ripples in the charger output. Charging Head Network uses oscilloscope to test the ripple value output by the charger, compare it with national standards, and detect the output quality of the charger. The lower the ripple, the higher the quality of the charger's output.

ripple test is divided into two types: no load (Y-axis current in the histogram is 0A) and heavy load (Y-axis current in the histogram is non-0A). In the no-load part, under 220V 50Hz AC input, the charger has the highest ripple when it is in the 5V0A no-load state, which is 152mVp-p; when it is in the 20V0A no-load state, the ripple is the lowest, which is 44mVp-p. In the heavy-load part of

, under 220V 50Hz AC input, the charger has the highest ripple when it is in the 5V3A output state, which is 142mVp-p; when it is in the 9V2A output state, the ripple is the lowest, which is 88mVp-p.

Temperature test

As mentioned earlier, the problem of efficiency conversion will be involved when the charger is working. Most of the power lost is dissipated as heat, so the heat generated by the charger when working for a long time is also an important part of the test. Let the charger continuously output power of 20V3.25A 65W for one hour, collect the surface temperature of the charger, and place the charger in a 25°C constant temperature box throughout the experiment.

First, let’s take a look at the temperature performance of the charger in a 220V50Hz mains environment.

html After 31 hours, the maximum temperature of the two side surfaces of the charger was photographed using a thermal imager to be 62.2°C.

The highest temperature on the other two sides is 65.4℃.

Let’s take a look at the temperature performance of the charger in a 110V 60Hz mains power environment.

html After 31 hours, the maximum temperature of the surfaces on both sides of the charger was photographed using a thermal imager to be 62.8°C.

The highest temperature on the other two sides is 62.5℃.

summarizes the temperature data under two mains input conditions for everyone's convenience.

The histogram part can clearly see the maximum and minimum temperatures of the charger.

1 hour full load stability test

If used for a long time, will the charger reduce the frequency due to overheating? Charging Head Network also tested NetEase’s carefully selected 33W charger 1C1A.

adjusted the charger to 20V3.25A and continued to output 65W power for one hour. During the test, the voltage and current were in a straight line with no obvious fluctuations. It is also quite stable when used at full load for a long time.

Charging Head Network Summary

Although it is a product two years ago, its high degree of integration and fixed pins bring the power density of the Lenovo 65W charger to 1.01W/cm³, which is considered to be the best today, and its portability is excellent. Moreover, the charging performance of this charger is still stable. According to actual tests, all types of new mobile phones, notebooks, and tablets can trigger fast charging.

Highly integrated chargers are more likely to overturn in terms of heat performance. After an hour of full load testing, the temperature performance of Lenovo's 65W charger is good. It can be seen that the materials used are quite solid. This may be the style of a major manufacturer.