Nile Air モバイルバッテリー飛行ポリシー。

短い回答

Nile Air is tracked from its official Restrictions page. The Important Notice: Lithium Battery Safety Onboard section states passengers are not allowed to carry more than two power banks, each power bank must not be more than 100 Wh, power banks and spare lithium batteries are strictly prohibited in checked luggage and must be carried in carry-on baggage, and e-cigarettes and power banks must not be used or charged during the flight, including charging power banks or using them to charge other electronic devices on board.