How to choose a suitable charger

With the evolution of 3C products, equipment has higher power requirements. In modern times where usage is increasing but time is less, the trend of "fast charging" chargers has emerged and has become an indispensable part of life.

Charging speed will be measured in watts. In other words, from electrical theory, we can know that the higher the wattage (power) of the battery, the faster it will charge!

[The formula for power calculation is: Power (W) = Voltage (V) x Current (A)]

As long as you find a way to increase the voltage or current so that the power is greater than the original rated power, you can achieve a fast charging effect. This is also the basic principle of current fast charging technology.

Currently, the fast charging technologies on the market are mainly divided into two camps: 1. Qualcomm’s QC (Quick Charge) and 2. USB’s official USB PD (USB Power Delivery).

■ The most popular one on the market is QC 3.0. Maximum support is 36 W.

■ QC 4+, supports up to 100W.

■ QC5, can support a maximum power of 100W+.

As long as it is the latest QC 4.0, QC 4+ or 5 fast charging version, it can support the USB PD standard ~

■ USB PD fast charging can be divided into five power specifications: 10W, 18W, 36W, 60W and 100W. The voltages are 5V, 9V, 12V and 20V. It can be used with Type-C connectors with a maximum current of 5A.

Now the latest generation of PD3.1 can support an output power of 240W. Therefore, PD fast charging can also be used on tablets, laptops, TVs and other devices that were not supported in the past. The supported devices have been greatly expanded. It is also compatible with Qualcomm’s latest QC 4 and QC 4+ fast charging technologies.

Starting from PD 3.0, "PD" fast charging also has the function of converting charging power at any time with "dynamic voltage". It can provide different power output according to the needs of different devices to achieve more efficient charging. If your device only requires lower power charging, PD fast charging can ensure charging safety by reducing the charging power.

In order to unify usage specifications, PD fast charging adopts the current mainstream specification: Type-C interface with no front and back distinction. Therefore, more devices can be supported! That’s why some iPhone charging cables have Lightening on one end and Type-C on the other. A Type-C cable is required to achieve PD fast charging.

?Key points for selecting "PD charging head"

■ 18~30W: mobile phones, tablets, cameras, drones, gadgets (Bluetooth headsets), ultra-thin laptops

iPhone 13, iPhone 14, iPhone 15 series:

The maximum supported charging power is 27W

■ 45W～60W: Tablets, high-efficiency laptops

■ 65~100W: Large high-efficiency laptops, desktop monitors, and docking stations

MacBook: Almost all use 65W as the standard

■ 100W and above: large ultra-high-performance notebook computers, smart homes, LCD monitors, flat-panel TVs