Air Do モバイルバッテリー飛行ポリシー。

短い回答

Air Do is tracked from its official restricted-items page: mobile batteries/power banks up to 160 Wh are carry-on only and are not accepted in checked baggage, units over 160 Wh are rejected, and spare batteries plus mobile batteries over 100 Wh and up to 160 Wh are capped at two in total per passenger. The page also prohibits charging power banks from aircraft power, using power banks to charge other devices, and storing power banks in overhead compartments; power banks must remain close at hand and lithium batteries require short-circuit protection.