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Oxygen concentrators and CPAP/BiPAP devices are prescription-required medical devices under FDA regulation. A valid prescription is verified prior to fulfillment regardless of payment method. Content on this site is general health information, not medical advice — see our editorial policy.

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Definition

Battery Capacity (Wh)

Battery energy capacity measured in watt-hours — relevant for portable oxygen concentrators and CPAP because airlines cap carry-on lithium battery capacity at 160 Wh without prior airline approval, which extended batteries on some devices can exceed.

FAA-Approved Oxygen: What It Actually Means →