Here is a lithium battery that is used by photographers to power our studio strobes while on location. It's made by Paul C. Buff in Nashville, TN. I've used it with my ResMed S9 AutoSet and can get around 13 hours of use per charge. It's less than $250.00, very well built, weight is around 3.5lbs an...

My DME provider sent a RT out to show me how to use the ‘brick’ they set me up on. They fit me for one mask and were on their way. They never once called to ask if I was compliant or how I was feeling. The DME however would call every couple of months to try and sell me supplies. After I quite order...