Before the National Day holiday, the charging head network has conducted a series of tests on the charging performance of iPhone 8 plus, including the compatibility of various USB PD chargers and the full charging monitoring of Apple’s original 29W. Through the test, we found that when charging with Apple’s 29W charger, the speed is indeed much higher than that of the previous generation, especially in the 1 hour before charging, the power growth rate will be significantly different.
However, due to the high price of Apple’s original accessories, many small partners generally turn their attention to the CDQ02ZM charger produced by Xiaomi. After all, in the previous test, this USB PD charger also showed good compatibility with iPhone 8 plus, and the price of 99 yuan is also very conscientious. So, today, I will also test the actual charging speed of Xiaomi 45W USB PD charger, as well as the temperature change of the mobile phone during the charging process.
Let’s first understand the parameters and performance of the charger. This USB PD charger was launched around April this year. It is one of the earlier and more classic USB PD chargers, and its price is close to the people, which makes it popular. As a USB PD charger, Xiaomi CDQ02ZM has an output capacity of 45W, and the voltage covers five voltage output gears of 5V, 9V, 12V, 15V, and 20V. It has a wide range of performance.
When using the Xiaomi 45W USB PD charger to charge the iPhone 8 plus, the tool used is still POWER-Z KM001 and the corresponding computer software.
The voltage and current curve this time is different from the last Apple 29W. The charging process of Xiaomi 45W charger to iPhone 8 plus can be roughly divided into three stages. In the early stage of charging, handshake the USB PD protocol and output at 9V for about 65min; then the voltage is reduced to 5V output, and continue to charge at 5V/1A for about 10min; finally, as the power of the mobile phone increases, the charging current gradually decreases until the end of charging.
Before the phone was turned on, it was charged with 5V/1A trickle for about 2 minutes, and the charging power was only one-third of Apple’s 29W during the same period. After the phone was turned on, the charging power reached 15W, and the peak power could reach 20W. For the later constant voltage charging process, the test also lasted for a full hour.
The curve of the battery percentage of the mobile phone is basically consistent with the test results of Apple’s 29W charger. Charge to 46% in 30min; when charging for 65min, the battery is about 79%. After that, the USB PD protocol ends and enters the 5V charging mode; the battery is about 93% in 90min; it takes about 2 hours and 20 minutes to fully charge the phone.
Compared with the Apple 29W, although this test uses a completely different charger, the overall charging time of the mobile phone is not much different under the premise of the USB PD protocol, and the charging speed will vary in some specific time periods; the remaining power of the mobile phone is one of the determinants of charging power.
The whole test process is carried out in an environment at room temperature of 28 ° C. The above are the initial charging, charging 30min, charging 45min, and charging 60min are the thermal imaging images of the back cover of the mobile phone. Compared with the Apple 29W charger, when using the Xiaomi 45W charger, the heat generation of the iPhone 8 plus is slightly lower, which is related to the output voltage of the two chargers.
In the above test items, Xiaomi 45W USB PD charger has shown good performance. Compared with the last Apple original 29W test results, Xiaomi’s charger is too good. And in the ranks of the few big-name USB PD chargers on the market, Xiaomi’s price is quite eye-catching. So, if you are a iPhone 8 plus user, what will you choose?