Fortunately the Cigarette Lighter Adapter is included in the package of this product. Also universal AC travel adopter is included, for USA, Japan, EU, UK, Australia. I need to buy nothing except portable battery. I choose battery with cigarette lighter output. GOLABS i200: 12V10A works and it indicates 58-60w, Renogy GP14: 12V15A also works well. I suffer from pneumonia. This concentrater is useful to go out. May be consecutive works 9
h45m, no description in manual continuous hours but timer maxim.
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