We travel full time in an RV and at times, we are without electricity. We both us a CPap and have been searching for an affordable battery back up. We purchased the Flashfish 300W Portable Power Station 60000mah Solar Generator With 110V AC Outlet/DC 12V/QC USB Ports For CPAP Camp Travel. It came fully charged and we plugged both paps into that night and my husband used it for 7.5 hours, I used it for 9 hours and we still had power left on the machine. We are completely satisfied and know we'll not have to suffer those nights without electricity. THANK YOU!!!!