Necessary for life: some small knowledge of power adapters

Mobile phones are becoming more and more intelligent, and we use mobile phones more and more times in our lives. Many people have to charge their mobile phones 3 to 5 times a day, so it is necessary to learn some common sense about power adapters. Next, I will share some little knowledge with you.
1: The output port of the multi-port charger is not necessarily all fast charging
For example, if a three-port power adapter charges three mobile phones at the same time, the charging power of the two output ports of Type-C2 and USB-A will drop to 5V and fast charging cannot be enabled, but USB-C1 can still enable fast charging. Charging and multi-port power adapters have more or less strange interface protocol compatibility issues. For now, many multi-port power adapters on the market are not compatible with iPhone 12, and they cannot be charged when plugged in.
2: Keep in mind when buying a power supply - cheap is not good
You get what you pay for, the price is different, and the configuration of the power adapter is also different. The most obvious point is that a good adapter feels delicate and smooth to the touch, and the second best adapter has safety certification, six levels of energy efficiency, and eight levels of protection. In terms of quality and safety, it is strictly controlled, and there are basically no problems in normal use. Not necessarily with cheap adapters.
3: Consider appearance and convenience
The center of gravity of the square adapter is designed to be relatively inward, and it is not easy to drop when plugged into the wall for charging. In addition, power adapters of other shapes will not work. We can also give priority to adapters with foldable pins. When traveling, put the pins away and put them in the bag without worrying about scratching the phone.