There is a very popular new product in the Xiaomi store recently: Xiaomi USB charger 30W fast charging version (Type A+C), a very lightweight charger with a set of Type-A and a set of Type-C connectors, Type-C It supports up to 30W fast charging, and Type-A supports up to 27W fast charging. The reason why I am interested in this product is: because I have the need to use a laptop for work outside and use a mobile phone as a hotspot, it can help the laptop at the same time. Charging with the phone, but how about the charging speed when charging at the same time?

So I want to try this thing here, B3F-1102 , but I want to explain that because the shipping time is late, I can't wait, so I went to Shopee to buy the land version, but the charging power is the same.

It looks like this when plugged into a household socket. It seems that it can accommodate another extension cord or plug, but you can apply it to your own needs according to the width measured above. It doesn't seem to take up the socket next door, which is also one of my requirements for this type of product.

First take a look at the markings and supported specifications on the charger:

Input specifications: 100-240V~50/60Hz 1A, which is an international voltage, and can also be used abroad when traveling on business.

Output Specifications:

Simultaneous use of dual holes: maximum 5V-4.8A (total 24W charging power).

Only use Type-C: 5V-3A, 9V-3A, 12V-2.25A, 15V-2A and other charging power, the maximum is 30W.

Only use Type-A: 5V-3A, 9V-3A, 12V-2.25A and other charging power, the maximum is 27W.

Using the current detector, Type-C supports USB-DCP, QC2.0, etc., and also supports PD fast charging.

Type-A supports Apple 2.4A, USB-DCP5V-1.5A, QC2.0, QC3.0, Samsung AFC 9V/12V, Huawei FCP 9V-2A and other protocols.

It seems that the Xiaomi charger can be used for Apple devices and PD fast charging, QC2.0, QC3.0, Samsung fast charging, Huawei 18W fast charging, etc. The actual speed depends on the fastest speed that each mobile phone can accept, and the power is different in different charging stages.

Starting from 0% here, we measure the power of iPhone 8 plus, Galaxy S10+, Huawei P30 Pro and Xperia 1. The power of the Xiaomi charger is as follows. They each have different fast charging protocols and speeds. Although the results may not all come to the manufacturer Set the fastest speed, but still can be regarded as fast charging.

Let's see how to charge your laptop and mobile phone at the same time.

The laptop used here is a 13-inch MacBook Pro, and the mobile phone is the same as the four above. Like this two charging at the same time, both start to charge from 10%, the mobile phone has a hotspot to share, and the power is recorded every 10 minutes, but the time is related, the mobile phone only records for half an hour.

The power increase is roughly like this. When charging at the same time, the mobile phone is about 7W to 8W, and it is charged by 6 to 8% every 10 minutes. The laptop is charged at 15W, and it is increased by 1 to 2% every 10 minutes. It's ok for the phone (and the phone is acting as a hotspot), but it's slower for the Macbook Pro, but it's still charging and can continue to work for the needs of running to the coffee shop outside.

When the two are charged at the same time, the surface of the charger is measured to be about 56 degrees (generally in an air-conditioned room office).

Later, when I unplug the phone and only use the Type-C end to charge the Macbook Pro, it becomes 30W, and the charging rate increases by 6~7% every 10 minutes.

Therefore, the conclusion of the title is: at the same time, although it cannot be quickly charged, the laptop is still charging slowly and can maintain its working state.

There are many types of Type-A+C two-hole fast chargers on the market. In addition to being relatively cheap, the advantages of Xiaomi's fast chargers are that they widely support fast charging protocols of various brands. Most brands of mobile phones can Enjoy the fast charging power, Type-A can reach 27W, Type-C can reach 30W, it seems to be fast at present.

As for the shortcomings, because I haven't used other A+C fast chargers, I don't know what the power and temperature are when charging laptops and mobile phones at the same time. I can't share the comparative disadvantages. In use, the durability should be observed. , and the others have not found much shortcomings so far.

If the students have tried other good ones, they can charge the charging head of the laptop and mobile phone at the same time, or they have been using the Xiaomi fast charging head for a while, and welcome to share.