https://battery-travel-notes.pages.dev/Power-bank rules explained before the gate, with the source beside them.https://battery-travel-notes.pages.dev/features/gate-check-bag-power-bank-remove/https://battery-travel-notes.pages.dev/features/gate-check-bag-power-bank-remove/FAA guidance puts spare lithium batteries and power banks in carry-on baggage. If that bag is gate-checked, keep those items with you in the cabin.Fri, 30 Oct 2026 00:00:00 GMThttps://battery-travel-notes.pages.dev/features/checking-a-power-bank-s-wh-rating-what-the-faa-formula-can-and-ca-2cacfcae/https://battery-travel-notes.pages.dev/features/checking-a-power-bank-s-wh-rating-what-the-faa-formula-can-and-ca-2cacfcae/For spare rechargeable lithium-ion batteries, including power banks, the FAA says to multiply voltage by amp-hours to calculate watt-hours. Its guidance lists 100 Wh per battery and describes a larger allowance using the ambiguous wording “exceeding 101–160 Wh,” with airline approval and a two-battery limit. The supplied FAA formula does not explain how to convert a label in mAh.Fri, 30 Oct 2026 00:00:00 GMT