The "band restriction order" issued by the State Civil Aviation Administration really puzzled a group of power bank fans. I don't know what kind of power bank can be taken on the plane. Generally, the standard capacity of power bank supplies is mostly between 3000 and 15000mah, and individual products have a marked capacity of 20000mah. The marked voltage of most power bank  supplies is between 3-5V.

    It is understood that the watt-hour of the "band limit order" is actually a unit of rated energy value. The conversion formula between capacity, voltage and rated energy value is: capacity (mA) × voltage (volt) = rated energy value (watt hour) . According to this formula, people can calculate whether their power bank  can be carried on the plane. According to this calculation formula, when the voltage of the 20000mah power bank  supply is 4V, the rated energy value is 20,000 mA×4V=80 watt-hours, and less than 100 watt-hours meets the regulations of the Civil Aviation Administration. 　　

    In addition, if the power bank  bank carried by the passenger is not marked, boarding is not allowed. Among the disputes caused by the power bank  supply handled by the airport police, 80% of the power bank  supplies carried by passengers belong to the three-non-products. There is no capacity mark on the products, and airport security personnel cannot determine whether they can be taken on the plane.

    Can the power bank  supply be carried on the plane?

    The answer is: part of it is possible.

    The Civil Aviation Administration of China stipulates that, for example, when the mobile phone power bank of 20000mah has a voltage of 4V, the rated energy value is 20000mah×4V=80W·h. If it is less than 100W·h, it can be taken on the plane. If it is 5000mah, the mobile phone with a voltage of 5V Power bank, according to the formula we can calculate 5000mah X 5V = 25W·h, this can be two correspondingly. Another important prerequisite is that power bank  supplies cannot be carried with other brands, and power bank  supplies that are not safe enough to board the plane. 

    Some time ago, the Samsung note7 exploded and spontaneously ignited. For this, the civil aviation also has a certain skepticism towards Samsung batteries. In April, when flying on the plane, the flight attendant of the civil aviation stated that Samsung mobile phones and batteries cannot be brought on the plane. Passengers are requested to cooperate to avoid the danger of explosion.

     Therefore, electronic products that have been exposed to explosion hazards will be carefully checked when they pass the security check. There is a milliampere limit and a limit on the number. If you bring your mobile phone and power bank  on the plane, please make sure to budget yourself so as not to be unable to board the plane at the end.