Buy Airsep Focus Portable Oxygen Concentrator -

The unit is FAA-approved for use on commercial flights and operates on universal power (AC/DC), making it suitable for international travel and car charging. Battery Life & Power Options

Because the unit is so small, it relies on external batteries to keep its weight low: buy airsep focus portable oxygen concentrator

The AirSep Focus, manufactured by CAIRE, is recognized as the world's smallest and lightest medical-grade portable oxygen concentrator. Weighing just 1.75 lbs (0.8 kg) for the unit itself, it is designed specifically for active patients who require low supplemental oxygen (pulse dose setting of 2) without the burden of heavy equipment. The unit is FAA-approved for use on commercial

Typically comes with two micro batteries, each providing roughly 1.5 hours of use, for a total of 3 hours . manufactured by CAIRE