can i bring 20000mah power bank on plane, The general rule for carrying power banks on a plane is that they are allowed as long as their capacity is within the specified limits set by the airline and regulatory authorities. While specific regulations may vary, most airlines adhere to the guidelines established by the International Civil Aviation Organization (ICAO) and the International Air Transport Association (IATA).According to these guidelines, spare lithium-ion batteries, which include power banks, with a capacity of less than 100 watt-hours (Wh) are typically allowed in carry-on baggage. However, power banks with a capacity exceeding 100 Wh are generally not permitted without prior airline approval.