Portable Oxygen Concentrator

My mom has been battling with COPD. It means Cronic. Obtrusive. Pulmonary. Disease. Her Pulmonary doctor order her to use oxygen at all time, even to sleep. We are asking for help because we just dont have that money lying around.
she barley goes out because the oxygen tank is heavy, they limits her mobility and the worst of it all, is that the oxygen tank give about 4 hours. Before it needs to be switch out.

Getting my mommie a portable oxygen concentrator would ease her and our lives. We will be able to go to the park, get ice cream and not be scared that she runs out of oxygen.
This machine makes its own oxygen, it runs on rechargeable battery and you can travel on a airplane.
Even a 1.00 can make a difference.

Thanks =0)