FAA lithium battery rules for CPAP batteries

US rules for carrying lithium ion batteries on passenger flights apply to CPAP batteries, which count as portable electronic medical device batteries. Check the watt-hour (Wh) rating printed on your battery; if only volts and amp hours are shown, multiply them.

Battery ratingAllowed?Airline approvalSpare battery limitWhere to pack spares
Up to 100 WhYesNot required by FAANo FAA quantity limit for personal use (airlines may set their own)Carry-on only, terminals protected
101 to 160 WhYes, with approvalRequiredNo more than 2 per personCarry-on only, terminals protected
More than 160 WhNoNot allowedNot allowedNot allowed on passenger aircraft

Notes

  • Spare lithium batteries must be carried in carry-on baggage only and protected from short circuit, for example in original packaging, with terminals taped, or in a separate pouch.
  • Many airlines set stricter quantity or Wh limits. Check with your airline before you fly.
  • Damaged or recalled batteries must not be carried in carry-on or checked baggage.
  • If you plan to use your CPAP onboard, a US airline may require batteries for at least 150% of the expected maximum flight duration (14 CFR 382.133), and may require 48 hours advance notice.
  • TSA says CPAP machines, masks and tubing may stay in their carrying case for X-ray screening but may be required to be removed from the carry-on.
  • Rules as published by the FAA and in 49 CFR 175.10 when checked in October 2026.

Sources

More reference tables

AHI severity scale for adult sleep apneaCPAP mask type comparisonCPAP power draw (manufacturer figures)CPAP pressure units: cm H2O to hPa and mbarCPAP vs APAP vs BiPAP vs ASVCommon HCPCS codes for PAP devices and suppliesMedicare PAP supply replacement schedule

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