A China 20000mAh PD Fast Charging Power Bank is a portable battery pack that can charge your mobile device at a much faster rate than a regular power bank. 
One of the main advantages of a China 20000mAh PD Fast Charging Power Bank is its speed. With a regular power bank, it can take hours to fully charge your device. However, a fast charging power bank can charge your phone up to 50% or more in just 30 minutes. This is particularly useful when you're in a rush and need to quickly top up your battery before heading out.
Another advantage of a China 20000mAh PD Fast Charging Power Bank is its compatibility. Most modern smartphones and tablets support fast charging technology, so you can use a fast charging power bank with almost any device. Additionally, some power banks come with multiple ports, so you can charge multiple devices simultaneously.
When choosing a China 20000mAh PD Fast Charging Power Bank, there are a few things to consider. 
First, you should check the capacity of the power bank. The higher the capacity, the more times you can charge your device before needing to recharge the power bank itself. 
Second, you should check the output voltage and amperage. The higher the voltage and amperage, the faster your device will charge. 
Finally, you should consider the size and weight of China 20000mAh PD Fast Charging Power Bank. A smaller and lighter power bank will be easier to carry around, but may have a lower capacity.
In conclusion, a China 20000mAh PD Fast Charging Power Bank is an essential accessory for anyone who relies heavily on their mobile device. It offers fast and efficient charging that can keep you connected and productive throughout the day.