Whether a 20,000 mAh power bank can be taken on an airplane or not, the following factors need to be considered first:
First of all, we need to understand the capacity limits of aviation regulations for the batteries or power sources to carry. Usually, airlines have restrictions on the capacity of batteries or power sources that passengers can carry, which is to ensure the safety of the flight. Therefore, we need to look at the airline's regulations to determine if the 20000 mAh power bank exceeds the maximum capacity allowed to be carried.
Secondly, in addition to capacity limitations, airlines may also have restrictions on the types and brands of power banks. Some airlines may only allow certain brands or types of power banks, or may have special regulations for certain brands of power banks. Therefore, before deciding whether to carry a 20,000 mAh power bank on the plane or not, we need to carefully read the airline's regulations and make sure that our power bank meets the requirements.
In addition, it should be noted that even if the 20,000 mAh power bank complies with the airline's regulations, you need to pay attention to how it is used during the flight. For example, during the flight, avoid charging the power bank or connecting it to electronic devices to ensure the safety of the flight.
To sum up, whether a 20,000 mAh power bank can be carried on an airplane depends on the airline's regulations and how the power bank is used. In order to ensure that you can carry a power bank on board smoothly, it is recommended to check with the airline in advance and read the relevant regulations carefully. At the same time, the requirements of the airline should be complied with during the flight to ensure the safety of the flight.