Does the LiveO2 make its own oxygen and how much electricity does it use?

No, the LiveO2 and LiveO2 AC sys­tems sep­a­rate oxy­gen from room air using an air sep­a­ra­tor with a fil­ter. It only uses elec­tric­i­ty to extract oxy­gen from room air. Most air sep­a­ra­tors use about 500 watts of elec­tric­i­ty.