How much battery life do I need?

The FAA requires that you carry sufficient battery life to power your portable concentrator for at least 150% of your flight time. (For example, if you have a 4 hour flight, you would need 6 hours of battery life). Please have at least 2 batteries on your flight, even if it's a short one, as an extra battery allows you a back-up in case you experience travel delays.

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