Spring Airlines Japan モバイルバッテリー飛行ポリシー。

短い回答

Spring Airlines Japan is tracked as market-regulator-backed for Japan power-bank carriage from the MLIT / JCAB April 24, 2026 power-bank passenger notice: power banks are prohibited in checked baggage, must be carried on board, must not exceed 160 Wh, must be individually protected against short circuits, must not be placed in overhead compartments, are limited to two per passenger, and may not be charged or used to charge other electronic devices during the flight. Airline-owned lithium-battery policy text still needs direct official-source review before this carrier can be marked official.